What do you mean "Ways around everything?"
I know Tee Time Rentals (Kenny/Kelly) rents golf carts, but you have to meet them offsite to either hook up their trailer to your truck, or take their truck (with the trailer attached) to bring the cart into the Fort (make sure you have your MB/pass/id). They give you about an hour to return with the truck Which is more than enough time. Typically this has to be reserved well in advance depending on the season. Leaving, you just reverse the process. I think they have 6 seaters, but no clue as to how many. If you are considering them, I suggest you call them immediately.
Also the Fort has 6 seaters too. I do not believe you can "Reserve" a 6 seater. You can only reserve a normal (4 seater) cart. They are more expensive then off site, but if the stay is short (or the rental is only a day or two) it's probably easier.
There may be other off site rentals but I have never used them nor am I aware of them.