We stayed June 6, 2019. We were driving cross country and wanted to see this national park along the way. This was the tail-end of their “peak season” since it is the desert most people visit in the cooler months and avoid it in the summer. We rolled in around 5pm, the ranger station was already closed but we drove on to the campground where there was a self pay station. Plenty of open sites that were not reserved at the time. The sign upon entering says there’s no water within the campground but this is incorrect it must be an old sign. Flush toilets with sinks (no soap or anything to dry your hands just bring your own) also no lights in the bathroom so take your flashlight at night! Beautiful campground, with lots of desert wildlife! This is the southern portion of the park so there’s no Joshua Trees here but if you drive through the park northwest then you’ll see the Cholla cactus gardens, Boulder fields, as well as the Joshua Trees!