Definitely possible. Plenty of both there. Were you going to backpack with your friends or base camp or stay at a motel? If it's the former, tell me where your general location will be in the Gorge and I can give you some ideas.
"I fish because I love to; because I love the environs where trout are found, which are invariably beautiful... because, in a world where most men seem to spend their lives doing things they hate, my fishing is at once an endless source of delight and an act of small rebellion; because trout do not lie or cheat and cannot be bought or bribed or impressed by power, but respond only to quietude and humility and endless patience...." --Robert Traver