we had a happy waitlist story at VB. Last Aug, I called right at the 7mo window to reserve Easter break, and got all of my nights except Easter Sunday. So I waitlisted for that night only (we did get the next night) and crossed my fingers. It came through the week after Christmas! So it took awhile, but was worth it - and was probably one of the harder nights to get.
I would think more cancellations occur the closer you get to your trip dates, so hang in there!