1. you cann check your status online and see if a cabin no. is listed but you may not know til you arrive at the pier.
2. yes, all you really need is your fun pass but I always take my final payment print out from CCL or your TA just in case.
3. your airline etickets should be in your email box pretty soon. Usually they come right after ticketing. You may want to check with the airline if you don't have them.
4. Dont forget your passport and another form of photo id.
5. If you are on a Carnival excursion they will have a method of dealing with your luggage. Don't sweat it.
6. Relax and enjoy