I'm closing in on 69, and a frequent crew member is a decade older. It's all about physical condition and the need for adventure, not age. Yes, I notice I'm becoming a little more unsteady on my feet, but I accept the fact, and therefore I very much agree a catamaran would be the best option. I also agree that perhaps the greatest chance of injury would be dinghy related, be careful. And finally, I also agree with no winter in the Bahamas, sort of defeats the purpose.