I just called and talked to a reservation agent and she said most likely there is a convention coming in. When that happens they book out the whole hotel and open up rooms once all the specifics for the convention are figured out. So if you check later there may be availibility. We have reservations at the GC, but due to unexpected expenses (the transmission went out on DH's car) we were going to change to the Paradise Pier. It had a few room types available yesterday, and today there is nothing! The kids were home yesterday, so I couldn't call since this is a surprise trip. Things change quickly, so I will just keep watch and switch when the room I want opens up. Oh well things will work out in the end! We've never stayed onsite before, so if we don't that will be ok with us.