I assume you are leaving from the Port Orleans Riverside, formerly Dixie landings. We left from there for our 4 day cruise (12/14/03) and we queued up at 12 or so, left at 12:20 or so. Got to the ship, 1:30. In the future, I was told that some of the hotels have buses that leaver earlier, like the Grand Floridian and Contemporary.
We tagged our luggage and left it with the cruise desk there. They took our transfer documents there, but we checked in at the port with everyone else.
Hope that helps.
goingbacksoon