I'm actually waiting to hear from Bob at Dreams Unlimited, who booked it. I called him today and he said he would get back to me tomorrow -- so maybe I'll get something definitive then.
I have heard several people say they bring an air matress or if 3 of the people are small children have them sleep in 1 bed. Maybe you can get a rollaway, but for some reason, I thought I remembered someone say those were only at the Dolphin.