Haven't been there myself, but I've known and know of others who have done so. It's very doable in terms of places to stay and "rent-a-wreck" vehicles for transportation. If internet searching doesn't turn up what you're looking for, I could look for some old fishing reports from the fly fishing forum. The only safe guard issue I"m aware of is that POW is litterally crawling with black bears - one behind every tree - so if you intend to camp, food storage is a major issue. However the weather during steelhead season is sketchy, and if I were going, I would get a room, a cabin, or something with a good roof.