OP is correct, you cannot use two codes at the same time. As for the Gen. Pub. code that is now out, for us, our AAA rate was better. Not to mention that there were no rooms avail. during our travel time with that code. ( We are at AKL - 2/2 - 2/10).
Call your AAA agent and ask them to check to see which is better for you. You are at WL - from my own experience, and reading many post here on the boards, the deluxes for the first part of Feb. don't have a lot avail. with the code .
BUT, it never hurts to check!
Good Luck!!