Believe it. It’s not the website. The first 2 weeks in December have been almost fully booked for months. Random rooms pop up once in awhile of course. I am going the 7-14th, booked in Sept ‘18 on a bounceback. I always keep checking resorts availability even after I book. By the late spring/ early summer, there were less & less rooms showing. There are many threads & posts about it. People keep speculating about glitches, cancellations, booking algorithms etc. It is a very popular time. Add to that, Thanksgiving is very late this year, so there is also 1 less week for people to travel to see the Christmas events.