There are two campgrounds. Atlatl Campground has showers, modern restrooms and large sites, some with water and electric. Usually not a problem mid-week, but not uncommon to fill on weekends. We have been there twice when the "campground full" sign was out at the campground entrance road, but there were open sites. So drive in and check it out. The ranger station is quite a ways away, so keeping current with the sign is not at the top of their list.
The other campground (Arch Rock) is older and more primitive, no hook-ups, smaller sites that can be tight for big rigs. Usually doesn't fill.
This park is a spectacular place. Do not miss it if you have the chance.
Safe travels.
2013 GMC Sierra 2500HD 6.0
2014 Surveyor Sport 220RBS