you are on the edge of season for them, most close for brooding times for resident bird populations..
in coulee city there is a place that is year round that I have used in the past, no extra fees or memberships.. Rusty H. is good people, great for working dogs and tuning in off season. they even have rooms to stay in. This used to be Pitts Game Farm until Joanne passed and Jim sold out. normally pheasants and chukars are available year round there.
hidden ranch outfitters. tell him bruce wallin sent you!