Hard to tell as far as weather. We had a pretty cold spring with snow and a lot of rain in those areas. We were going to boondock over off of Hwy 75 North of Ketchum, but with 4 inches of snow in the forecast, we went elsewhere. My suggestion would be to go to Campendium.com and search for campgrounds, as there are quite a few off of Hwy 75 between Galena Summit and Ketchum. A lot of boondocking areas there too, but that site will have links to the FS websites for seasonal dates. I always call the FS offices for campground information ahead of time and they're always pretty good. Along Hwy 21 West of Stanley to Lowman, most, if not all campgrounds are open and usually free in late September, they often stay open till the snow flies. We've gone up and camped in October at FS CGs for free at that time. Anyway, go to Campendium. If you don't have an account, add one because it's a free site.
