We upgraded one of our cabins at the port and paid the difference. The two cabins were originally booked through DVC - I had one person paying cash and one person paying with points for each cabin. I believe I also paid points for my daughter in one of those cabins. We went from a cat. 11 to a 5 or 6 (need to look) for about $650. (We also wanted to make sure a cabin was available not too far from the other cat. 11 where sons were in - for laundry purposes, etc.).