I'm currently booked at ASMo 12/23-12/31. We want to add another night, so checking out on New Year's Day. When I try to add that day online, it says there is no availability. I called, and they said the same thing. But when I price out a package online for ASMo 12/20-1/1, it goes right through. Shows availability. Could I rebook my vacation for these dates, and then cancel the first few nights that I don't need? Obviously there are rooms available for that night.