Thank you all again.... I have been perusing the Good Sam website and have found a number of options. I searched under Palm Desert because it is one of the few snowbird communities I know. There are a handful of options that would work. Any other towns to research?
Also, my kids are really good about entertaining themselves with books, iPads, swimming pools, walks, cooking, yoga classes, really anything. I am not concerned that they will get bored. Remember, we homeschool, so they are used to hanging out with the family for most days. The sunshine will be enough to keep us all happy!