I loved this first come-first serve campground ! What a beautiful setting in the Bitterroot National forest. There is a lower, paved campground (Lake Como CG) below the dam with electric & water, but Three Frogs ( dry camping) is just up the road from it & walking distance to Lake Como. There seemed to be available sites. The sites are very nice for tents, smaller trailers or vans. Site #'s 2 & 21 were spacious & flat.
The camp host , Nancy, was so helpful & nice. I paid only $7.50 per night with my lifetime National Parks pass ( normally $15). It is definitely worth hiking the 6 mile RT easy trail to the waterfall along the lake, or going for a paddle or refreshing dip in the lake. (August 2023).