Two things...
1) I called to check on the same thing, but with my DC discount, and I was told that they would allow me to apply the discount for my brother's room, but we had to be staying at the same resort at the same time. Which was not our plan.. (They got $45/night at Grosvenor through Priceline for 11/28 - 12/5..Which a much better deal anyway!)
2) When I called to make my DC reservation for FW 11/28 - 12/5.. I was told all the DC sites were already gone. I then inquired about AAA and was told that those sites are already gone too. So they must get grabbed up really fast. I am not sure when they start accepting reservations for the AAA or DC..
So my advise is to call ASAP! Good Luck...