Here's a start....study this site for pictures of campgrounds. They also have some on video (YouTube).
I don't know if you've been to the Phoenix area RV parks previously but if not, you are going to find that the parks are filled with permanent Park Model trailers with some sites set aside for stand-alone RVs. You'll find that the big parks will have lots of activities if that interests you. Some parks have trees and some do not. For summer you are going to want some shade if you can.
There are plenty of parks within an easy drive to downtown Phoenix. You should be able to find one to suit you.
I'm sure you're aware that it will be up to 115 degrees or so in the summer and if you're paying your own electric it's going to cost you. Also, if you planned to turn off the AC during the day when you're at work, it won't be good for your furnishings and the AC will have a tough time cooling all the heated things down. Also try to park where your refrigerator will not be on the south or western-facing side. The hot sun will make that refrigerator work hard and probably won't cool as well. Covering your windows with foil insulation will help greatly.
It can be done. Good luck!
http://www.campgroundviews.com/listings/?fwp_location=33.4151843%2C-111.8314724%2C25%2CMesa%252C%2520AZ%252C%2520United%2520States
