In order to get an
AAA discount AND add the dining plan, the package (which would also include park tickets), HAS to be booked through a AAA travel agents. You *can* call Disney directly to get a room-only AAA discount, but then you can't add on the Dining Plan.
Last fall I booked a room directly with Disney and used a AAA discount. Before the trip, a great discount code came out (this was a "general" code that anyone could use) and the package included the park tickets, room, and dining plan. After checking all the figures I saw that this new discount code package would only cost me about $60 more over what I already had, so I changed my AAA room-only discount, to a package that included the tickets, room, and dining plan. So basically the discount gave me an almost-
free dining plan. Well, that's the way I chose to look at it. lol
If you book a package through a AAA
Travel Agent, and then a good discount code comes out, I am not sure how easily you'd be able to switch it over. The travel agent is always a middle-man, you'd have to do everything through them. I am not sure how a new discount code would be handled if you were already using a AAA travel agent. Maybe someone who's done this before we reply.