I think some of that is TBD.
DVC in FL tends to be busy when the parks are not as busy since folks are trying to maximize their points. I would imagine some of that will be mimicked at VGC. That being said, I got an October 11 ressie a few weeks ago and called today to check on availability late September and was told I could probably get a room, but they would have to check with a manager (it was near opening and several folks have reported similar things being mentioned when they called.) Its also difficult to tell at this point what folks will book since it is not sold out.