Tongue River Reservoir State Park was our last stop before arriving at our destination in Helena, MT.  Quiet park not far from the interstate surrounded by a wonderful lake.  Facilities were very clean and the area is quite flat.  No problem leveling RV.  Did not use any of the facilities so I cannot comment.  However, watching the boats come in at sunset was very relaxing.  The Montana landscape and how it changes colors as the sun sets was beautiful.