You need to stay just for the observatory! Super friendly staff, very nice sites, mix of paved and gravel sites, nice wide paved access roads. All 30/50amp FHU, some shade in most spots, too. Clean and very well maintained, and the staffs pride in the park shows. Good views of the mountains from most sites. They even let you wash your rig for a small fee.
Great cell and Starlink coverage, easy walk to the Safeway and Ace, but you wouldn't know they were there otherwise. Quiet park, quiet area. Easy access to Benson, which is worth checking out along with Tombstone, the Mexican border, Saguaro National Park, and Kartchner Caverns State Park.
A 5 star resort except for 2 minor things, the stupid train runs ALL the time, and the sites have a large curb from the road and are a BIT short for larger rigs, but otherwise an amazing RV park.