Be forwarned - last May and June there were no AP rates at all, at any of the resorts. We went in June, and ended up paying the AAA rate, which was better than rack rate but still high. They simply didn't issue AP rates for several months because they were already heavily booked.
You should go ahead and book if you really plan to go, and then if an AP rate comes out, you can call CRO and ask if it's available for your dates and resort. It helps to be a little flexible about when/where you're staying.