This is us exactly.I'm just speaking for myself but I've never had that happen. I don't think it's very common unless maybe at an extremely busy time. I've never had any problems with availability and I've always gotten what I wanted whenever I've called.
That being said, you might not always get your first choice but finding SOMETHING available shouldn't be a problem during most times of year.
I've been shut out for the last 4 months in trying to get a 2bdrm during the second week of Dec. I've been on the waitlist for any resort except SSR, but nothing has come through yet.
I guess than i wouldnt have a problem, we go every year somewhere between Dec 1 & Dec 15. So I could make my ressie 11 months out, every year.
Thanks everyone for your help, keep it comin'