We used Rolling Hills as a stop over on our voyage from Oregon to Arizona. We stayed one night. The park is CLEAN, Quiet, the sites level, The Park staff are helpful.  The park is on the campus of a casino with multiple eating establishments.  A Fuel station/truck stop in also on the ground.. I should be more generous in my ratings, but to get five stars the park needs mature trees. Guess I spent too much of my life in Oregon