On Tincup Creek you will find Tincup Campground south of Alpine, WY. It has 5 single units and restrooms.
From Alpine, WY, head southwest on US-89 S for 12.8 miles. Turn right at WY-239 W for 1.6 miles. Turn right at County Line Rd/State Line Rd and go 0.9 miles. Turn left at ID-34 W for 3.1 miles and your destination will be on the left.
Fun little creek campground is primitive. Bring big spray lots of biting flies and mosquitoes
It's a free campground, which is awesome. But there was trash left behind. Someone left their broken tent (site 5) and we had broken glass on our site (site 3) looks like a window was broken. We stayed here with another set of campers, but not sure I would stay here alone. Maybe...I just had a not so great feeling. But we stayed the night, it was quiet. A nice place for a quick sleep and get back on the road.
A local sheep rancher uses this camp ground for his hired help. They bring in campers, water tanks etc. For the workers, don't know what they do about sewage there are no pit toilets. The workers dogs run free and in the fall it's used as a hunting camp.
It's not much, but it's free! We stayed two nights in a tent, both nights there were others staying, but it was peaceful. There wasn't really any trash at that time. Only 3 spots. No toilet.