Government Wash on Lake Mead reminded me of a miniature version of Quartzsite, without the town. Lots of gravel, open views, and folks parked where they find a level spot. I stopped by for a couple days on my way home from the Arizona Strip trip and easily found a spot that didn't require me to unhitch to get level. The next morning I caught this shot as the sun started to rise.
While I didn't have a view, there were spots that did. There were some really primo spots but I think I would have wanted 4 wheel drive just to make sure I could get back out once I'd gotten in. That may be why those spots were open...
There was one recognizable camp. The folks from Aluminarium had their Campendium flag flying. They'd scored a really neat hilltop spot with good views and room for several friends, one of whom was nicely positioned to provide a wind break for the serious winds that came up over night.
I counted 27 different RVs scattered around the area. (That's me on the far left.) Not at all crowded but not a solitary experience either. There is no fee for camping, but would be a fee for the National Recreation Area if the entrance you come through is staffed and you don't have some form of National Lands pass.
There are a few more spots like this, with fewer people, scattered around Lake Mead and Lake Mohave.