Really great spot. We had a group of 9 and stayed on a Monday and Tuesday at campsite 30. We showed up without a reservation and there was plenty of vacancy. We had a bit of a weird interaction with the site managers when we first got there - they were not very helpful and seemed a little annoyed - but it all worked out. Campsite 30 was a good spot for the size of our group with plenty of flat space for tents. It was conveniently located nearby the trash/recycling, water, and bathrooms. The bathrooms were VERY clean with flushing toilets. It was nice to be able to pick out our campsite because a lot of the sites were uneven and didn't have much flat space to pitch tents.
It was very hot while we were there, so during the day we went to Red Rock, which we heard had a bunch of water holes. It was about a 5 mile drive from the campsite and another half mile hike from the parking lot to get to the first big water hole. It was a spectacular place (check out the photos) with some rocks at various heights to jump off of into the water. We were the only ones there for about 2-3 hours.