Last time I booked BCV at 7 months was for 4th of July 2013 and I got it without waitlisting for 5 nights. Seems it is much more challenging now than it was then. If you have the points, a 1 bedroom is the way to go to ensure you wind up at the specific resort you want.
I can tell you we always go in September, the week after Labor Day and I never can get a full week at the BC.
This year, we are going a week later, September 11-19 and I still couldn't get a week there, and couldn't even walk
beginning September 1 if I wanted to try. I can say, I do try studios and 1-2 bedrooms, but this year, I needed
a studio since other trips planned. I was successful getting a studio P/G view at BW but if I didn't walk it beginning
September 1, I wouldn't have gotten my 8 nights. We stay in studios, 1-2 bedrooms and occasional GVs and
can tell you, this is the first year, for a early/mid September trip, I did not have my choice for studios at the monorail and BW resorts, with the exception of BLT LV.