As others have mention, I agree, sitting in the scooter will not be a good thing. I suffered for the last 2 years with back issues--ruptured disc pressing on my S5 nerve which caused constant leg pain and a numb foot, plus a host of other back and muscle problems. Did PT 6 weeks 3 different times. Had the series of steriod injections in my spine and nothing helped. I was concerned about taking pain meds regularly -- mostly because I didn't want to get addicted and it interferred with my maragrita consumption. I had the discetomy last March and am pain free. While suffering with the back pain, I found walking (and stretching) to be the best theraphy of all. Sitting was the worse thing I could do. I had my back surgery last March and went to WDW 6 weeks after. I was limited, but did not have to rent a scooter. I did pass on the mountain rides and dinosaur (actually tried the safari and it almost killed me), but did make it to the maragrita stand in record time. Been back twice and can ride it all again (went in August and again in October). Good luck and get your back healthy...50 is too young to be having all of those issues and interfering with your Disney trips.