Prescott, Payson, Roosevelt Lake, ???

I'm planning to head to Arizona - specifically to visit family in and around the Phoenix area. I'm looking to find a great place to camp while I'm there, reasonably close enough to visit family, and where I might leave my rig undisturbed for a period of time. While I may be subject to 14-day limits, I'd still like to find a place where I can relax and enjoy the scenery, and perhaps some of the local sights and geography.

Do you have any suggestions? I generally check freecampsites.net, and RVParky, along with RV Trip Wizard... hoping some personal experiences will offer better perspective...

Thanks!