We stayed at Journey's End last February, rented a golf cart and took the road north up and back. Glad we did it, gave some kids a ride to school, had lots of fun. But, we really didn't want to do it again. You take a pretty good pounding because of all the holes, and it sounds like it's worse now. Both of us had a headache and were forced to spend a few hours just relaxing on the beach with a cold one. :-) Also, it takes a lot of time, because you can't go very fast at all, especially in the dark coming home from dinner. Figure maybe an hour to get home? I'm guessing. Oh, and you definitely want to be wearing a good bra, as opposed to your postage-stamp bikini top.
Maybe you can rent a cart for one day, and then extend it if you're having fun with it. That way you don't reserve/pay for more than 24 hours until you decide for sure.