At Bryce we always stay at Ruby's Inn RV camp located just outside the park entrance. VERY nice cg with water & electric. Sites large nough for big rigs & most are Pull Thru sites. Nice 'Campy' atmosphere in the park even tho it's within walking distance to all amenities ... Motel, resturant, shops & even full service gas station with RV repair bays!
In the Nat'l Pk. there are 2 camps. Water only. Sites are kinda small & usually full. If you don't need electric there is a really beautiful Forest CG about 10 miles west of Bryce on Rt.12 called Red Canyon. It almost rite across the road from the famous natural tunnel. Great, large sites in wooded area. Its like U'r camped at the bottom of Bryce among the hoodoos. 1st come 1st serve.
While visiting Bryce make sure to do the Navaho trail hike down into/thru/among the spires. Amazing hike and not too terribly difficult.
About 10 miles east of Bryce on Rt.12 is Kodachrome State park. Again, water only, but very nice large sites. A great hiking area.