You really won't know until you call - availability changes so frequently and both BCV & BWV are relatively small resorts and quite popular choices.
That said, if you call as soon as your 7 month window first opens and as soon as MS opens for the day (9 am Eastern), you will probably get lucky.

The Pool/Garden category at the BWV has the most rooms & is more likely to be available than any of the other categories. Don't be afraid to waitlist.
If you waitlist, you will have to choose between 3 options at BCV & 3 options at BWV. You are only allowed two active waitlists per use year.
BCV - dedicated with 2 queen beds in the second bedroom.
BCV - dedicated with 1 queen bed and a queen size sleep sofa in the second bedroom.
BCV - lock off 2 bedroom. Has 1 queen bed and a double size sleep sofa in the second bedroom as well as a kitchenette. (It's really a 1 bedroom and a studio with an interior connecting door between them).
BWV - Pool/Garden view
BWV - Boardwalk view
BWV - Standard view
Boardwalk and standard view categories are very popular and between them have about 40% of the total rooms available. These are less likely to be available than the Pool/Garden rooms, which make up about 60% of the resort. All 2 bedrooms at BWV are lock offs.
HTH. Good luck!