Well is always possible. I altered my BCV studio to a 1 bedroom for 4 nights in October. When I called there was nothing available, I waitlisted night by night and the last night came through yesterday. We are leaving on the 13th October. People change their plans at the last moment, ask to stay on the waitlist until 7 days out.
Mind you reading your post again, if renting points can you go on the waitlist ?