My parents and in laws would stay in Apache Junction, one with a Park Model, the other with a motorhome.
During the summer months, when they were back home here, they would leave 5 gallon buckets of water in the trailer and motorhome, so it wouldn't dry out. Then once a month, they had someone that stayed year round to refill the water buckets.
I haven't been down there for 4 years and the area around Phoenix changes so much all the time, I have no idea what the best place is to stay. But quite possibly in two years, may become snowbirds like our parents.
2016 Forest River Heritage Glen 276RLIS
2012 Chevrolet Silverado LT 3500HD Duramax