We've been at Cottonwood campground for fishing. However, we hired a guide. Fishing right from the campground is not the best. The guides know where to go. We had excellent results and got the biggest trout we've ever caught - catch and release fishing. Absolute beauties.
You can hire a guide nearby at Abe's Tackle. He has a web site with good fishing information which is up-to-date. From the paved road you'll have less than a mile of good gravel road to travel to the campground. There's nothing nearby so load up your refrigerator/pantry before coming. It's definitely a fisherperson's destination.
We went in May and June and the river level was perfect at 500 cfs. July would be hot so better check on fishing at that time. There is a dump station but no water fill although we were allowed to fill from a spigot outside the restroom building.
The best sites for our 40' motorhome with electric were 45, 35, 4, 43, 47, 40, 36 in order of preference.
Full-timed for 16 Years
. . . Back in S&B Again
Traveled in a 2004 Newmar Dutch Star 40' Diesel