Stayed for a 1 nighter as we traveled from CO up to Yellowstone.  Quite and peaceful.  Only 5 sites, first come first served.   The paved road on the back side of the Sinclare refinery leading up to it is pretty beat up, just be advised.    Not a ton to do there unless you fish. We just wanted a nice out of the way place for an overnighter.  This place delivered.