Grand Plateau RV Park in Kanab has blocked-out 20 full-hookup sites until Tuesday, February 2. There may be availability after that in or out of "our" area, but she indicated that they are filling up fast for the spring. It's a brand-new RV park with sparkling-clean private shower and restroom facilities; campsites are clean and level, though not a lot of shade yet; pool and hot tub on-site. April temps are 65-70 F in the day and 35 or so at night.
See UWAC legacy website for additional info. and registration instructions.