Joe,
We have charged to our room at all three resorts in the past. Last year I used a gift certificate to pay most of our bill. If I remeber correctly I went to the desk the day before check out and applied the gift card to the bill. Then when they slipped the invoice for our stay under the door the night before checkout it showed the gift card applied and just the remender of the bill charged to our credit card. Also the dinner for 2 certificate worked at Simply Fish and we saved alot. I just ordered another for this years visit 1/30 thru 2/13.