In 2015, we stayed on the East side at Two Medicine CG, and loved it, it's rather remote and quiet, no hookups, but there is a water fill & dump station, flush bathrooms but no showers.
We stayed 4 days, gorgeous scenery, it's first come first served, so get there
Early in the morning, we got there at 7am and waited for someone to leave and jumped right into the site as they were pulling out, then went to register. We would definitely stay there again.
2007 Forester 2941DS
2014 Ford Focus
Zamboni, Long Haired Mini Dachshund