When you pull up to the campsite, you will immediately be intimidated by the steep and windy road up the cliff to access the campsites. It's actually quite wide, smooth, and easy to drive up without any issues (27ft travel trailer). Don't let that deter you.
Stayed here in January, so the 10 degree difference from Vegas wasn't necessarily a good thing. Probably a huge plus in the summer. At the top of the hill there are a few boondocking spots that are featured in most of the pictures. About a mile back I found a hilltop spot along one of the side roads with great views. However, it was VERY windy exposed at the top of a hill like that, with winds rushing down the main mountain.
Other reviewers mentioned the rehab camp, which I visited while exploring the back roads one day. It's not ideal to have that nearby, but didn't have any issues throughout my stay. There are employee cars and companies providing services driving back there all day, but it's not a big deal.
Couple miles away is the visitor center for the mountains, along with a resort with a restaurant. Only services are back down the mountain towards Vegas so come completely filled up when you make the trip up the mountain. Also a ski hill if you wind around the mountain, but probably 20-30 miles away.
Did see a few burros grazing around the area, but didn't make it to my campsite. There is a cool slot canyon at the entrance. You can either park at the lot by the road and walk about 1/2 mile, or drive back down the single track to park closer.