Campground is "Hidden Valley" (not "Real Hidden Valley" across the road)
Of all the campgrounds in Joshua Tree this one is consistently the most slammed. It can be extremely difficult to get a site here as they are available on a first-come first-served basis. If you don't get a site here but you want to check out the cool features that make the site so popular, do not despair! There are two day use parking lots in the area so you can park/hike/climb by day. Bring your own water (there's a tap at the park entrance where the ranger station is). You can park at Intersection rock parking lot and enjoy everything Hidden Valley has to offer.
Things that make this campground so popular- classic climbs on all sides, beautiful views if you scamper up any of the rock formations, tons of climbers and a weekend climbers coffee hosted by the climbing ranger.
heads up that falcon nesting in the spring means some areas are closed- please respect closures.