Well, let's suppose that a 55+ park let kids stay for the season. If your kids were permitted, there would be others. It wouldn't really be a 55+ park, would it? There are many who prefer facilities for adults over 55 because they tend to be quieter. The fact that there are so many of these parks attests to their popularity. There are lovely parks and campgrounds in Arizona that do not discriminate by age. And wouldn't the kids be happier seeing all the wonders of the state than being cooped up in a geezer resort?