Your mileage may vary, so take this with that understanding.
The policy is that anybody can make a reservation with a
AAA discount. The number and expiration date will be needed when booking the reservation. At check in, both a AAA card and the owner of that card will be required to keep the discounted rate.
That's the policy. Whether or not they actually request the card? I don't know. I personally would not be willing to take that chance. I would either probably get a AAA membership. (THey're not that expensive, and the benefits extend far beyond a Disney resort discount). Or, I would just pay rack rate or try and use a general public code.