I am not an AAA member but my partner is. As she hasn't got a credit card, if I book with my card and then she shows her AAA membership at Disney check-in, will we still get the AAA discount applied? I understand this is okay at Universal but I'm not sure about Disney.
We've done that before. We sometimes travel with my parents, so we book two rooms using our AAA card for the discount, but we pay for our room with our credit card, and they pay for their room with theirs. We have the reservations "linked" so they can have our discount, but still pay with their own card. I'm assuming that if you will only be in one room, it would be even easier to do that because you will only have one reservation.
I agree, I think as long as the person with the membership is in the room or part of the reservation you can use the discount. I would call directly to confirm, but it looks like you would be ok.