For the first few days of our stay at Fort Wilderness, we didn't rent one, and it was a pain to get around, because believe me the camp ground is HUGE. Once we rented one though, it was so much easier, definetly worth the money. Basically, at FW, you have to take one bus to the buses that take you to the parks or wherever you want to go. With the kart, you can skip the first step, but it really depends on if you have a car with you, and how big your group is.