Yeah, I wouldn't drink at state parks. My friends got busted for it, the rangers walked around on foot and came out of the bushes, we didn't even see them, and my dumbass friends had beer in their hands. Bad thing is they were underage at the time. If you're smart about it you won't get caught but it's not really worth the hassle.
Andrew if you find a place let me know. I've been trying to find a new place to camp, every place I've been to has been a state park. Some of my friends used to talk about camping at Trapper Johns but as far as I know it's just a canoe/kayak place...