I'll be 76 in October and love driving my MH. I hit the gym every other day which helps maintain my physical ability to operate the rig safely. I'm also an avid 4 wheeler and think nothing of navigating really rough trails for 20 or 30 miles round trip. When I feel I'm not 100% confident in my ability to operate a large motor vehicle in a safe manner I'll hang up the keys to the MH. The keys to the pickup will probably follow at a later date unless some unforeseen physical event precludes that. I've had cataracts removed from both eyes and my vision is excellent now. I feel it's a choice only the individual can make to determine their personal abilities. Like Clint said, " a man has to know his limitations".