I had both hips replaced within one year - there was not the faintest problems getting in and out of the Morgan, 3 or 4 Wheeler. Of course, some caution is needed especially when the hood is up. I can imagine the feelings of your wife and you, I was also very uncertain whether I could ever drive any of my morgans after surgery. Follow the advice of your phycisian and of the ergotherapeut that will train you or your wife after surgery.
My original hipjoints never were as flexible and reliable as the replacements.
Good luck for surgery!
