As noted, for Saturday you really should not worry about timing. However, you may want to reconsider the specifics of your plan depending on your arrival time. Assuming you're not getting in too late and that you'll get your car on arrival, I'd likely get something closer to Macon. Assuming no construction or traffic delays you're looking at a MIN of 6 hours driving time from the airport area. Even knocking an hour off the trip on arrival day will improve your chances of getting in to the Disney area in time for lunch and saving likely having to stop for lunch en-route. The Macon area also tends to be much cheaper for hotels that around the airport, esp if looking at priceline. IF you're getting the
DDP, that will add further value to my suggestions. Have a great trip.