Unless things have changed since last year, the airline will not let you have anyother destination tags on your luggage. Address tags yes.
Anyway its not a good idea to put your cruise destination tags on your luggage until after you have landed. It has been know to cause mix-ups , and if the tags get torn off you will have to get new tags at the pier. I keep my cruise luggage tags in my carry-on and put them on our luggage at the hotel