You don't have to wait until 3 hours before departure time to use RAC. You can do your RAC check-in any time between 5:00 a.m. and 1:00 p.m. for flights any time that day, but you must finish the process no less than 3 hours before departure time. Your scheduled DME pick-up time will be around 3 hours before before departure time, give or take up to 15 minutes. You should be at your pick-up location at least 10 minutes before the pick-up time. With a 10:45 a.m. flight, your DME pick-up time time for a domestic flight will be between 7:30 a.m. and 8:00 a.m. I would be at the RAC counter at least 30 minutes before your DME pick-up time. There may be a line, so you may have to wait for your turn. And, as at the airport, the process itself takes a few minutes. As with any skycap service, a tip is appreciated. You can also get RAC out of the way much earlier. For example, you could take care of it before breakfast, have breakfast, and return to your room for your carry-ons before your DME pick-up. Going home is never a fun way to end a vacation. DME is a shared transportation service. MCO is a half hour away if there are no other stops and no delays, but you'll probably stop at one or two other resorts, and delays can happen. The TSA checkpoints at MCO can have long lines that move slowly. Your flight will board 30 minutes before departure. You should get to your gate before boarding begins. Actually, I think using RAC and DME at the end of a WDW vacation is a lot more fun than having to drag your bags through the airport to the airline counter and waiting in a line with your bags. It's great to get on a DME coach with only your carry-ons and to go straight to TSA Security and then to your gate.