The GF has a HUGE walk-in gingerbread house where you can actually purchase smaller gingerbread houses and gingerbread cookies. They also have an enormous Christmas Tree that is something to behold. The BWI also has neat Christmas decorations -- if you go to the BC you might want to walk over and check out the lobby of the BWI. Also, as long as you're in the area you could stop by the YC too -- I can't remember what their Christmas decorations are though.
All of the Deluxe resorts seem to have incredible decorations and of course they're themed to the resort. The CR has silver Christmas trees.