Julia,
You flatter me! (Please don't stop!)
Plan A: Do as much of your park-related activities at the start of your vacation. You have a few light/moderate crowd days before the really large Christmas crowd arrives.
B: Avoid Extra Magic Hours as the week progresses. These otherwise great perks end up driving up the crowd levels at the given parks. So navigate away from them to lessen the load. (*one exception listed here)
C: Book your meals as soon as possible. Reservations book up quickly at all table service restaurants, and you don't want to be left out in the cold.
D: Relax. Don't let the crowds bother you, and don't try to "do it all", because you won't. Think of your vacation as being successful less based on the number of attractions you ride, and more on your enjoyment and relaxation levels.
Finally, here is where I would go;
- December 17 - Magic Kingdom (AM) / Epcot (PM)
- December 18 - Epcot (AM) / Magic Kingdom (PM)
- December 19 - Animal Kingdom (AM & afternoon) / *Hollywood Studios (PM)
- December 20 - Hollywood Studios (all day)
- December 21 - Magic Kingdom (all day)
- December 22 - Epcot (all day)
- December 23 - Hollywood Studios (all day)
So write me back if you have other questions!
Have a magical vacation!