We went on the Carnival spirit in Feb of 2007. My Aunt and Uncle wanted to go also. we were Past Cruiser they weren't. My TA called Carnival and asked them to extend the past cruiser rate to the other cabin, so we would not have to "split the cabins". Carnival was more than willing to do this. Has anyone tried just being up front with carnival and telling them what and why you want to do it?
BTW you will enjoy that cruise it is one of my favorite. Just the right amount of sea days and ports.