Here is our experience:
Be prepared for freezing temperatures at night. We had three days in Yuma where the fountain next to our rig froze. Low temps are generally at night.
I don't know how familiar you are with mountain effects on the weather, but elevation plays a big role in how low your temperatures go. We tent camped at Bryce Canyon, (almost 8,000 ft elev), in the middle of July and it got down to 25º F. A cousin of mine lived in Bisbee. One morning he woke up to 4 inches of snow. Bisbee is at 5500 ft.
We come into AZ from the west. We stay in Yuma, Quartzsite, Casa Grande, Phoenix, Sedona, and Tucson.
We stayed here several times. It is nice, but dusty. Roads unpaved but sites well separated.
Las Colinas RV Resort
Nicer, but you are like sardines in a can. Also limited to 55+. This has a pool whereas BT does not.
Tucson: We stay with my cousin. Can't help you here.
Sedona: We stay with my wife's cousin. Can't help you here, either.
Phoenix: Stayed at 3 rv parks only once each, north Phoenix, and Mesa. The Phoenix parks require 'fully contained' rigs. If you ask, they will say no porta pottis. If you don't ask, well we have gotten along. We don't really have a 'favorite', yet. Point: Save your aluminum cans. There are machines that will pay you cash for them. We got 3¢ for two cans. LOL
We like this because of the 'poolside' sites, electricity only for $22 per night.
Overview | Grapevine 7
Dusty, but nice activities. A place to change your oil and wash your rig, also out the back and under I-8 you can walk to Tyson Wells where many of the activities are.
The desert looks tempting, but we stayed there one night for the Egg Gathering and the temp in the rig in the morning was 42º!
There are BLM sites around Yuma and Quartzsite, but they are boondocking
, no services. We have electric heat, so need a better place.
Here is a website to find rv parks:
RV Park Reviews :: Arizona
I hope this helps. Maybe we will see you there this winter.