STARS: 4.5 out of 5
Valley of Fire Campgrounds (Atlatl and Arch), Lake Mead Area, NV: GPS 36.4303° N, 114.5143° W
We didn't stay in these campgrounds so I can't rate them higher than a 4.5, but they sure look like they have the potential to be 5s.
The Arch campground would be magnifient for tent camping or for smaller rigs (probably under 27 feet. Our rig would be too big. But you are surrounded by towering cliffs and rock formations, and nestled in amongst them.
The Atlatl campground is better for the larger rigs, but as such is very busy. It is still surrounded by beautiful rock formations, but you aren't quite as nestled in, hence it being easier for the big rigs. Still it is as really lovely setting.