If your room isn't ready when you get there (DVC rooms are notorious for not being ready until later in the afternoon) stop at the FD to see if they have anything. It may not be what you requested, but if getting into a room is more important, they may be able to help. The more requests you have, the tougher it can be to get in early as there are likely fewer of the rooms that match your requests, and one has to be checking out that day. DVC is almost always 100% occupied, unlike cash rooms. If your only request is for the third floor, that's a lot easier than a specific location in a specific building. Don't be too worried, just communicate with the FD and they will do what they can to help.