per the NF website:
Basic Information
Twin Peaks Campground is the main, developed campground at Organ Pipe Cactus National Monument, located 1.5 miles from the Kris Eggle Visitor Center and Highway 85. Twin Peaks Campground has 34 tent-only sites and 174 sites for RVs. Several sites can accommodate RVs up to 45 feet in length. Restrooms have running water and a few have solar showers. Hookups for electricity, water, or sewer are not available. A dump station, with potable water is located past the last row of campsites.