aaa offers a discount off your room rate of
value and moderate resorts - 20% in value season; 15% in regular, summer, and peak seasons.
Delux resorts - 15% in value season; 10% in regular, summer, and peak seasons.
If you want a room only you can book direct through disney or through aaa.
If you want a package you must call aaa. The discount for a package is the exact same as it would have been for a room only - the % off the room there is nothing extra off the tickets or dining. The discount is
not off the total package price.
There are some aaa benefits that you can only get if you book with aaa (I dont know if they apply for room only) I dont remember everything but you get a diamond card that has some discount at dtd, story time, discounts off tours, diamond parking (closer section of lot). Some AAA agents especially if they are Disney specialists can be very helpful.
Disadvantage you cannot view your reservation on the disney site or get information from disney about it. Any changes or updates must be filtered through AAA. Some agents become less than helpful for any changes that might need to be made, and are not very knowledgable or helpful in deciding what you need. Best bet is to know what you want and how much it should cost (this is fairly easily figured out since the discounts are published and rates are published) before calling. I look at aaa more of an avenue to a discount than as a
travel agent.