Availability changes by the minute at the 3 hotels. As I have mentioned before, after calling for the AP4 rate at GC late in July I was told that they had no rooms at that rate. I called the next day and asked about availability for each day and found that 1 of 7 days was avail at the AP4 rate. I booked it and continued to call almost daily for about 10 days. Eventually each of the days of our trip was avail at AP4 and I saved half on our trip! It is a real inconvenience, but well worth it for me.
Btw...Our trip is 11/10 to 11/17 and the 12th was the hardest day to get!