In the unofficial guide to WDW it says that it takes almost an hour to get back and forth from AKL to MK via the buses - is that really true? We're only going to be there for a short stay and will go to MK and AK - will it be too time-consuming to try to return from MK to the AKL for an afternoon swim/nap? Would it be much much more time-efficient to rent a car?