Look into Deadhorse State Park. This is about 30 mins west of Moab but a really spectacular State Park. Great campsites and the view from the overlook is unbelievable. Even if youo don't stay there, it's worth a day visit.
Not sure they have full hookups but definately electric with dump station.
Chris
2018 Nexus Ghost 36DS
360 Cummins, 3000 Allison
2016 Ford Expedition