I just tried calling for the AP discount, but the promotion ends (6/30) three weeks before our trip. I'm keeping my fingers crossed for a summer AP deal!So I did go ahead and call in to apply the AP discount to the deluxe CL room at BWI and even including the cost of the upgrade to an AP, saved $500 over the regular Sun & Fun discount.
I just have to have the AP by the time I check in, although of course I'll be getting it a lot sooner than that. Thanks for your help, everyone!