I just checked Marriott.com, and the site says the same thing, about being special event, prepay....... I did see the option for a standard room (AAA rate), but we wanted the larger room.....did book online? or over the phone?
I booked online and I left off the AAA search - I more wanted the room than anything! So I have it reserved at a fairly absurd amount, but figuring the convenience or the cost of getting two rooms with the amenities we want, it's ... right in line.