We live at Palm Creek Golf and RV Resort in Casa Grande. Not much grass here in AZ. Check it out
http://www.palmcreekgolf.com/. If you want a place with activities, this is it, otherwise Mesa or Apache Junction has a multitude of parks. I have stayed at Monte Vista RV Resort and Meridian RV Park, the latter is not much more than a parking lot. There are many spots in Surprise and Buckeye. It really depends on the level of comfort and activities you want or need......Gold Canyon is a new deluxe park that is a little farther out east of town. Nice park and many amenities...It is hard to find a long term spot if you don't do it soon. Good luck in your search....I would probably use RV Park Reviews and Google Earth to check out the parks, look for all the trees. Park websites can sometimes be deceiving but worth taking a look......