Leah,
I made our reservation on March 15th. I'd been calling for about two weeks before that for prices. Our rate doesn't include the trundle bed. With the bed it works out to about $125 per night. I booked three rooms (traveling with extended family) and they all got the $114 rate. We are paying a little over $900 for the five of us, seven night, including tax and trundle bed. I did look through DU but they didn't get me the discount either. Maybe you should give Disney a call yourself and see what you can get? Good luck! When are you going?