well, maybe you can sleep on the floor - you probably don't want to fall out of an upper bunk - assuming, of course, that you are able to get in it while intoxicated! maybe you could cut off alcohol at a certain time so you're semi-sober by the time you find your room. just teasing. all kidding aside, i think you kind of have to roll in & out of them. seems my daughter said you can't sit straight up in them - she's about 5'7". i feel pretty sure if you get an upgrade carnival is watching the # of people. i wouldn't think they would be able to afford many of that type of mistake. maybe you will get lucky and get one of those big rooms. that would be awesome! good luck.