I booked our golf cart about ten months in advance. Two weeks before our trip, my DH says, "Let's cancel it. We could use the exercise." He has lost 134 pounds and has kept it off for five years so EVERYTHING is about exercise.
Well....no sooner do we get there and wait and wait and wait for a bus and then lug on our three year old that wants to be held all the time does he say, "Let's go see if we can get a golf cart." Of course, they were completely sold out so we put our names on the list and we got one but not until Thursday which was four days into our trip. During those four days, it took us forever to get anywhere and one of us was always carrying our child. I tried really hard not to say told ya so.
The golf cart is really a must if you have small children. It made our lives so much easier and we didn't have to wait for the FW buses to come around. Plus, it was really nice to take our son for a ride during naptime. It kind of forced him to actually take a break from all of the action.
Next time, we will definitely get the golf cart. If your children are smaller, I would really suggest it.