How does it work for redeeming rooms for rewards? Do they give you a code or something when you redeem that you give to the hotel when you make your reservation, or how does that work. For example, could I make a reservation now, for the room I want to redeem for in December and then redeem and when it get closer, redeem using that reservation? If that makes any sense. Or, is there any way of telling if the room will be availiable for the night you want before you redeem your points for it? Thanks.