Judy, the previous reviewer shared a lot of great details, so I won't repeat them.

What I can add is that Wy residents cost is $15 and non resident is $18 a night. Self pay station. Sites are not numbered. They are first come only. Sites along the river are not shaded. The others have plenty. There is a train track nearby. We only heard 2 though. One late afternoon and one before 10 pm. It was not loud enough to be annoying. Lastly, come prepared. When we were there on a Wed and Thurs., no restaurant open. There is no grocery. There is a gas station that has a few basics.

There is a great hike 20 min away outside of Dayton. Tongue River Canyon. Stunning.