I don't really have any ideas on good areas... but, I do know of one guy's yard that turned up a whopper shed yesterday. Apology right now for not having pics - I asked and he sent them but he had posted them on a work drive that I can't get too from my home pc. But I will get them and post them as soon as I can.
But, oh my Gawd, you should see this shed. It's the right side of a totally mature blacktail out of Whatcom county that has height, deep forks, and sick mass. I've never seen a northern westside WA rack like it and I've seen quite a few. I would guess, based on the mass at the base and figuring for angle on the skull pedicels that he would go 22 or so wide and he's probably 16 or 18 high. But the thing is the mass. It holds all points right to the top with incredible mass. Even the eyeguard is impressive - probably 3 inches or so but totally stout. Of course, ivory tips on dark brown chocolate as this shed probably dropped the night before last or earlier.
The great part is, my buddy's son is the one who found it. He's around 5 or 6 years old and he brought it in with great pride, understandably. Apparently, he told his dad after presenting his find that after he found it, checked it out, and started coming in to show his dad, he felt "strong and brave". Are you kidding me? That kid has a guaranteed spot in my camp when the time comes!