I plan on visiting family that lives in Phoenix. My brother lives in South Phoenix by where hwy 143 ends. I've been there once, but don't remember seeing any parks near there. Looks like an ok part of town, and my brother would'nt live in a bad area. Not sure if that area is near another city or town, since they all meld together. I hope someone can help me.
You might want to try the Mesa Spirit RV Resort in Mesa, a short distance south of Phoenix. I haven't stayed there, but I have heard some good remarks about it from those who have.