We stayed in the East Rim campground which has power and water, but no sewer.
The sites are all gravel and very well maintained. Clean and no grass/weeds, etc. Some sites are more level than others and the spacing varies as well. Our site faced the access road, but we had no one next to us, so that was nice. You'll have to look at a map to see...
The vistas are very beautiful here and the flush toilets are a nice touch. There bigger sites have a concrete pad but the smaller ones are just on the side of the road. And Starlink works beautifully. The road in has several semi-steep, 4 degree climbs but nothing crazy.
We spent one night and ate at the restaurant in order to patronize the business as we are not gamblers. Upon arrival, you have to register for a casino card, then check in with security. If you are not a casino aficionado, go elsewhere.
This was a really nice place to stay - good views of the river from site #40. Full H/U, pretty level site, and ability to walk down to the river. We would stay here again.