On our last trip in December we moved resorts twice. Once from AKL to WL, and then once from WL to YC. Each time I called the bell services desk once we were ready to check out, and they were up at the room in 5-10 minutes to pick up the luggage.
Just make certain that when you call down there you tell them how many pieces you want them to transfer, and where it is going, and then when the bellhop arrives at your room re-confirm with him your destination.
The baggage transfers usually take place between 1 and 3 P.M, so don't expect to get your luggage anytime before 3:30. Once you get to your room and it is after 3:30 you can call down to bell services, give them your luggage id number that you should have received from your previous resort, and they should bring your luggage up rather quickly.
If we ever come to the point of transferring resorts again I wouldn't hesitate to use this service.
Brian