We stayed 2 nights at Eagle RV Park and Campground in July 2010. We loved our stay here ( in Thermopolis and the RV Park).
We found the park to be very clean and tidy, and the host to be more than welcoming. Like most RV Parks, the 'neighbours' were quite close but the grounds were neat and tidy.
Tubeing on the local river is available, for $7 per person. Transport up the river is included - it takes about 2 hrs and was fun.
The hosts recommended a great bbq trailer takeaway joint in town weekends, Grumpys, don't miss it!