Pre-2016, the pool/garden view studios and 2BRs were always open at 7 months out for any time in the summer, including holiday time. Then
DVC decided to destroy that convenience by adding a less than twin-size Murphy bed that pulls out of a cabinet to the studios, thus allowing members to book five rather than the previously allowed four in a studio. The result has has been that the pool/garden studios (and thus also 2BRs) can now many times be difficult to get at 7-months out even in August. Your chances are probably 50/50.
Nevertheless, it is highly likely that the pool/garden view 1BRs (which allow five, although there is bedding for only four) will be open at 7-months out for your desired time, and even the boardwalk view and standard view 1BRs have a decent chance of being open.
A caveat to add is that under normal time schedules, BWV is due for a refurb in 2023, and if that occurs, there will always be a block of some rooms out-of-service for times during which the refurb is taking place and that could lower the chances further for getting any room at 7-months out in August. Whether that refurb will actually occur in 2023 is still an unknown, e.g., the regularly scheduled BRV refurb has now been delayed two years as a result of covid.