I am assuming that with you using ME to the airport that you do not have a car. Please be aware that you are not allowed to take luggage on the Disney Transportation system (buses/monorails/boats). You will therefore incur costs for a taxi as well as the waiting time at the DTD check in point, plus time to get back to the resort. The early check in service with VA makes sense if you have your own car, but without one, you are likely to spend a good deal of time on your final day sorting out luggage and STILL needing to leave 4 hours before your flight departs. I would rather (and do) store luggage with bell services at the resort and head out to the parks or relax on the last day.