I just call 800 232-7827 and ask what discounts are available for the dates I want to travel. That is the 800# for Universal Orlando. If I don't like the discounts availalble, I call again. After booking, if I hear on the boards that rates are down, I call and ask for an adjustment. When you book through that #, they do not ask you to verify AAA, AP etc. at the time of booking, but they do tell you to bring the card with you at check in. That way, you have until time of travel to get your memberships in order. I have heard of people on these boards checking in with an AP rate, even though they were not buying the AP until after check in. I think they were asked to bring the AP back to the front desk when they got it.
The number I have been asked for when I book is my Loews First #. This is to see if upgrades are available.