Location, cost, hookups and facilities need to be considered individually. There is little written predictability in books. Talk to someone you trust or visit by toad or tow vehicle before committing to moving the RV there. When we visit one we stay in other campgrounds outside the Federal park. The sites are too small for our little 34 foot RV, there are generally no hookups and campsites are crowded with tourists.
Campgrounds are generally understaffed and under maintained.
We tour these beautiful parks by Tracker toad only. There is something else to keep in mind. Often they overlap each other. For example, our CTC home park also belongs to Passport America. There are many other organizations RVers can join to reduce their camping fees.