Drove around in the hours of the night unable to find a campground. Luckily it was just my friend and I, and since these campgrounds are quite large, we pulled into an empty spot and asked some folks if they wouldn't mind us sharing their campground in exchange for some money and food. They were more than happy to share and gave us advice on the park, shared their fire, and great stories about their experience here. These campgrounds are first come first serve and everything inside the campground was full when we got there so we got very lucky that we stumbled upon friendly people. The campground is close to many of the hikes and popular climbs in the park. It is very open with beautiful views and fun rocks to climb in the middle of it. I couldn't even hear any of the other campsites around us!
Camp sites here and at most campgrounds in Joshua Tree are first come first serve, making them difficult to snag during popular months (mid Fall through mid Spring). If you come during the week you should be fine, but the sites are pretty much always claimed by Saturday morning. If you do a get spot though, it's a nice enough campground. Every site has its own set of interesting boulders. Sites come with picnic tables and firepits, and there are outhouses and trash containers within quick walking distance.
One of the best campsites ever with restrooms and running water. It also includes a grill.