Yellowstone Valley RV Park is a good place to park if you don't want want to pull the grades in Yellowstone with your rig. Features include a full service restaurant. We stayed a week. Sites are level and gravel. Scenic location. Our first complaint is the wireless ... park advertises free wifi, but we were lucky to be online a few minutes daily. When we complained, staff reported the issue was "being addressed". Second complaint is the dump station. It is locked, and you have to retrieve the key from the office to dump.
Riverview RV Park is an excellent park if you're looking for a place to relax for a few days. Situated on a bluff above the Cut Bank River, it is very scenic and peaceful. The new owners (very friendly and helpful) have really improved this park since they purchased it 4 years ago. They own over 40 acres of riverfront property, so there's lots of places to walk and explore. The rock formations are fantastic. Wild horses come to feed on the opposite bluff daily. Facilities include a camp store and laundry. Groceries, fast food, etc. within walking distance. Don't let the drive past the city garage lot, or the tiny section of gravel deter you. We stayed 4 nights, and will return when in the area.