I have been booking a day by day reservation for December 21, 2002 to January 3, 2003 every morning for a 2 bedroom at VWL, and I manage to never get a busy signal and have only been placed on hold once. The other times, I get right through to MS. I haven't had any problems booking any of the nights (even today *A MONDAY*, I got right through with no busy signal and no holding).
So, if you are booking at the 11 mo. window you should stand a pretty good chance, although the standard view BWV rooms usually book pretty early.
Brandelle