You will be able to try making that Oct or Nov reservation as soon as you get control of your account and can start using it to make reservations.
The real issue you will likely have for Oct or Nov is finding room availability. Traditionally, WDW DVC has had two distinct demand seasons: (a) the high to extremely high "fall" demand season that runs from late Sep to marathon weekend in Jan, and (b) the more moderate season the rest of the year, e.g., room demand for the first two weeks of Dec makes Easter time look like an off-season. Members can start reserving their home resort beginning 11-months out from date of arrival, and other resorts beginning 7-months out.
Thus, trying to reserve just a few months before you want to go in Oct or Nov will likely mean getting a reservation will be difficult since most rooms will already have been reserved before even now, using the 11 and 7 month reservation windows. Your chances, if any, will likely be limited to SSR and possibly Kidani or OKW at WDW, and even those could be gone, although you may find 1BRs open (which at most resorts are usually the last room size to fill).