I've read in a couple posts that at peak times, you generally need the 11 month window. What exactly are the peak times? I'm assuming Christmas week and Easter week, and BWV and BCV during Epcot's F&W, but what are the other peak times during which it will be tough to get a reservation at the 7 month window or less? Also, are there times when it's really easy to get a reservation on short notice or does everything book up pretty much in advance?