Hi Ozz,
We always stay in the Apache Junction Area ( next to Mesa ) Lots of smaller & lots of Large Parks.
There is also a KOA there, If you want to look around for a Park for a few days.
Last year we went to the East Coast, year before...the Gulf Coast.......This year, we'll stay at
http://www.weaversneedle.com/
It,s less then $500 per month Plus .11 per Kwh for power (I think).
Like I say, there is a lot of RV Parks.......but if you haven't booked ahead....some may be hard to get into.
John