I don't imagine that they do, but I do recall something about AP rates usable at VB. You can call VB directly at 1-722-234-2000 and ask.
Still, IMO you are better off renting points from a DVC member during this time period off the DVC Rent/Trade board here in DIS. Aug/Sept is a low points time and a low occupancy time so for weekdays at least, you should do pretty well on points. On the weekend, however, you are almost always better off paying cash rate (discounted or even rack rate).
All of this refers to VB only (we love VB!), as I have never been to HHI. Good luck.