I retired the day I turned 51,(10 years ago)and have never had any regrets. As another poster said, I was the youngest person in most of the RV parks that I stayed at in AZ, as most retirees seemed to be in their mid sixties and older. I didn't have the same tastes in music, and other activities(bingo, card games, shuffleboard, etc). I finally settled in Lake Havasu City, AZ during the winter months as there seems to be a wide age group of retirees here. Lots of different things to do, with lots of festivals and events going on that appeal to people of all ages. It is definitely a fun town!
Since you can work anywhere, it might be worth your time to check it out. The locals and snowbirds all seem to be a pretty sociable bunch, so I think your wife would enjoy it too. Having the lake 20' from the front of your RV to look at each morning and evening doesn't hurt either:)