It's pretty much always a crapshoot, but I do think there is a chance, yes. It may be slim given those particular resorts at that time of year. However, I've had a good success rate with waitlisting over the years, though to be fair I've not tried BCV or BWV. I did go on a waitlist last May for a 1BR at VWL for the first week of December, and after much checking, calling, and hoping, wound up being able to go from a split stay of VWL-SSR-VWL, to a split stay of VWL-VWL (1BR and 2BR), to finally getting a 1BR for the entire stay at VWL. So, good things can happen.
You can check the website as often as you like, obviously, but I also called frequently to check for availability. I prefer being able to talk with a live MS person who might see something at the time of the call. Perhaps it makes no difference, but I've had very good fortune doing so over the years. Good luck!
(For what it's worth, I don't mind split stays all that much, either.)
