There are lots of issues with this topic. I would attempt to contact landowner, if I can't I would trespass knowing that I could be cited, recover my game, tag it and face the consequences. Most Enforcement officers would seize animal from landowner and then decide what to do with it depending on circumstances. Personally I would call 911 and get someone to respond so that the matter could be dealt with. If you aren't guilty of trespass you shouldn't have a problem getting the officers involved. There are unethical hunters however that shoot animals on private to say that it ran over or onto the private property..To be honest hard to prove..Most landowners have to press charges and most tresspass charges are minimal. Iceman covered wastage, however there are some other WAC's and RCW's that you should be aware of....
Remember each situation has its own issues and they aren't all the same. If you choose for instance not to get a permission slip from a landowner in a WDFW Access Program...the following would apply..and penaltie maybe assessed depending on the type of animal harvested..It could be construed as more than a tresspassing fine/issue.
NEW SECTION
WAC 232-12-421 Hunt or possess big game without an access permit. (1) It is unlawful to hunt for big game or possess big game taken on property in an access contract between the landowner or land manager and the department, unless:
(a) The hunter possesses a valid access permit provided on a standard form by the department, and issued to the hunter by the landowner, land manager, or the department in addition to all other required hunting licenses and permits; or
(b) The property is in a contract between the department and the landowner that does not restrict persons from hunting and does not require an access permit.
(2) Each big game animal possessed in violation of this section shall be treated as a separate offense under RCW 77.15.030.
(3) Violation of this section is punishable under RCW 77.15.410, unlawful recreational hunting of big game in the second degree, unless the hunting for or possession of big game constitutes unlawful recreational hunting of big game in the first degree.
and birds ...
NEW SECTION
WAC 232-12-422 Hunt or possess a wild animal or wild bird without an access permit. (1) It is unlawful to hunt for a wild bird or wild animal, except big game, or possess any wild bird or wild animal, except big game, taken on property in an access contract between the landowner or land manager and the department, unless:
(a) The hunter possesses a valid access permit provided on a standard form by the department, and issued to the hunter by the landowner, land manager, or the department in addition to all other required hunting licenses and permits; or
(b) The property is in a contract between the department and the landowner that does not restrict persons from hunting and does not require an access permit.
(2) Violation of this section is punishable under RCW 77.15.400 or 77.15.430.
Also...RCW 77.15.410
Unlawful hunting of big game -- Penalty.
(1) A person is guilty of unlawful hunting of big game in the second degree if the person:
(a) Hunts for, takes, or possesses big game and the person does not have and possess all licenses, tags, or permits required under this title;
(b) Violates any rule of the commission or director regarding seasons, bag or possession limits, closed areas including game reserves, closed times, or any other rule governing the hunting, taking, or possession of big game; or
(c) Possesses big game taken during a closed season for that big game or taken from a closed area for that big game.
(2) A person is guilty of unlawful hunting of big game in the first degree if the person was previously convicted of any crime under this title involving unlawful hunting, killing, possessing, or taking big game, and within five years of the date that the prior conviction was entered the person:
(a) Hunts for big game and does not have and possess all licenses, tags, or permits required under this title;
(b) Acts in violation of any rule of the commission or director regarding seasons, bag or possession limits, closed areas including game reserves, or closed times; or
(c) Possesses big game taken during a closed season for that big game or taken from a closed area for that big game.
(3)(a) Unlawful hunting of big game in the second degree is a gross misdemeanor. Upon conviction of an offense involving killing or possession of big game taken during a period of time when hunting for the particular species is not permitted, or in excess of the bag or possession limit, the department shall revoke all hunting licenses and tags and order a suspension of hunting privileges for two years.
(b) Unlawful hunting of big game in the first degree is a class C felony. Upon conviction, the department shall revoke all hunting licenses or tags and the department shall order the person's hunting privileges suspended for ten years.
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And finally Penalty assessments below..RCW 77.15.420
Illegally taken or possessed wildlife — Criminal wildlife penalty assessed.
(1) If a person is convicted of violating RCW 77.15.410 and that violation results in the death of wildlife listed in this section, the court shall require payment of the following amounts for each animal killed or possessed. This shall be a criminal wildlife penalty assessment that shall be paid to the clerk of the court and distributed each month to the state treasurer for deposit in the fish and wildlife enforcement reward account created in RCW 77.15.425.
(a) Moose, mountain sheep, mountain goat, and all wildlife species classified as endangered by rule of the commission, except for mountain caribou and grizzly bear as listed under (d) of this
subsection . . . . . . . . . . . . $4,000
(b) Elk, deer, black bear, and cougar . . . . . . . . . . . . $2,000
(c) Trophy animal elk and deer . . . . . . . . . . . . $6,000
(d) Mountain caribou, grizzly bear, and trophy animal mountain sheep . . . . . . . . . . . .
$12,000
(2) No forfeiture of bail may be less than the amount of the bail established for hunting during closed season plus the amount of the criminal wildlife penalty assessment in subsection (1) of this section.
(3) For the purpose of this section a "trophy animal" is:
(a) A buck deer with four or more antler points on both sides, not including eyeguards;
(b) A bull elk with five or more antler points on both sides, not including eyeguards; or
(c) A mountain sheep with a horn curl of three-quarter curl or greater.
For purposes of this subsection, "eyeguard" means an antler protrusion on the main beam of the antler closest to the eye of the animal.
(4) If two or more persons are convicted of illegally possessing wildlife in subsection (1) of this section, the criminal wildlife penalty assessment shall be imposed on them jointly and separately.
(5) The criminal wildlife penalty assessment shall be imposed regardless of and in addition to any sentence, fines, or costs otherwise provided for violating any provision of this title. The criminal wildlife penalty assessment shall be included by the court in any pronouncement of sentence and may not be suspended, waived, modified, or deferred in any respect. This section may not be construed to abridge or alter alternative rights of action or remedies in equity or under common law or statutory law, criminal or civil.
(6) A defaulted criminal wildlife penalty assessment may be collected by any means authorized by law for the enforcement of orders of the court or collection of a fine or costs, including but not limited to vacation of a deferral of sentencing or vacation of a suspension of sentence.
(7) A person assessed a criminal wildlife penalty assessment under this section shall have his or her hunting license revoked and all hunting privileges suspended until the penalty assessment is paid through the registry of the court in which the penalty assessment was assessed.
(

The criminal wildlife penalty assessments provided in subsection (1) of this section shall be doubled in the following instances:
(a) When a person is convicted of spotlighting big game under RCW 77.15.450;
(b) When a person commits a violation that requires payment of a wildlife penalty assessment within five years of a prior gross misdemeanor or felony conviction under this title;
(c) When the person killed the animal in question with the intent of bartering, selling, or otherwise deriving economic profit from the animal or the animal's parts; or
(d) When a person kills the animal under the supervision of a licensed guide.
[2005 c 406 § 5; 1998 c 190 § 62.]
http://apps.leg.wa.gov/rcw/default.aspx?cite=77.15.420