If you go the 1st few weeks of the month you should definatly be able to get some decent room rates. You also might want to recruit a family member from Florida to come along, because the Florida Resident specials during off-peak times like early December are usually pretty good. You might even get a delux resort room for under 200$.
On a side note, I got a room at the Beach Club for next weekend for 189/night.....I feel like I'm cheeting someone with that rate, go Disney!!