In the city of Lander you can camp for up to three days for free at the city park. It’s a pretty good deal as the the tent area is set back behind the stadium in a nice grassy area with access to flush toilets in the parking area. It was pretty busy while I was there, with quite a few families and cyclists taking advantage of the free camping. The Popo Agie River runs next to the park which makes for a nice sound machine to fall asleep to.  If you need a shower head over to the Recreation Center and pay $5 for use of the facilities. In town are some great restaurants (Cowfish is my favorite, with a microbrewery attached), and outside of town is some great hiking in Sinks Canyon and the Shoshone National Forest.