after getting all of this great info from you folks, I have tried to get the ent. card rate from HIFS but they say they no longer accept it. I just wanted to let everyone know. The best I could do was AAA for $108, 8/21-8/28.
Not exactly sure when they stopped taking it, but I made our reservations in January and had no problem. I think threads starting showing up around March that said they no longer took.