I'm jealous, that's been our primary EWa hunting spot for about 20 years, but will be in Montana this season. The Obrien drainage is good if you hike back in there, so is the Mt. Washington area, but down low on Washington you'll find a lot of hunters. Generally, anywhere you get off road over there you'll find some critters, if it hasn't been really dry, which it hasn't. You should see a lot of game.
Good luck, -D