I've stayed at both Slick Rock Campground and Archview RV Resort.
Slick Rock has a lot more large trees with shade but the sites are somewhat tight and is all dirt. It was a little cheaper than Archview. IIRC, Slick Rock Campground is one of the older RV parks so that is why they have more tree coverage.
Archview is newer so the trees aren't as big but the sites are a bit wider and also all gravel/dirt. It is a nice place and people are friendly. There is some very easy MTBing direct out of the campground to the northeast.
Both have full hook-ups available and are fine places to stay.