We did this last year. We needed a 2br unit for 11/27/05 thru 12/2/05.
We're SSR owners as well. I called at the 11-month window and booked SSR as a back-up. I then called at the 7-month window and wait-listed for BWV (all views) and BCV. I didn't wait-list day-by-day, though, because I wanted to be sure we got all 5 nights at the same place (didn't want to run the risk of having to change rooms with 2 kids under 3 yrs old), so I called at 7 months from our departure date.
Anyway, within a week or two our wait-list came through at the BWV for a preferred view

and within a few weeks of that our wait-list came through for BCV (I had stayed on that wait-list just in case it came through as well--had never stayed there before and wanted to try it)

.
As a side note on crowd levels, I found it quite a bit more crowded in 2005 than it had been during my previous visits this same time of year in 2000, 2001 and 2002. I was actually a bit disappointed in that. It's still MUCH better than summer/holiday crowds, but we weren't able to walk on to rides as much this time as in times past. I even asked a CM at MK if this crowd level was normal for this time of year now (haven't been since 2002) and she said, "No. It's much more crowded than usual. We don't know how to guage crowd levels anymore." Hmmmm...I guess that's good for Disney.
Anyway, have a great trip and good luck on the waitlists. I imagine something will open up for you at either location.