Way up in Gifford Pinchot forest there’s a backside entrance to twin falls that hasn’t been kept up by the state since the bridge washed out. You’ll have to find it via forest road maps. LOTS of hiking and fall scouting to be had here. Remote access may be limited to road closures or washout. It is possible to get a trailer down there but would likely require some scouting of the road first or have overland setup. Spots or right on the Lewis river.