We camped along Grassy Lake Rd on the way to Yellowstone from the Tetons. The first 7-10 sites are developed and have trash/bathrooms at each site. Some have 2-3 sites at each camp. We were not able to get a developed site but apparently the road goes all the way to Idaho with random primitive pull-offs to camp. We drove about 30 minutes past the last developed site to find a nice area next to a little creek and a bridge. We saw maybe 3-4 vehicles pass through the whole night and morning we were there. Definitely has that middle of nowhere feeling the farther you drive and we loved it! Watch out for mosquitoes and bears!