No better time to quit than on a vacation when you are away from all the usual cigarette triggers that cause you to light up. Take a vacation from everything.
Check with your local hospital/Lung Assn to see if there are any crash courses you can take before you go. They work. Best time to do it is now. You will be happier in ways you don't even know right now.
Plus one year of cigarettes that you will no longer be smoking, will easily pay for another cruise.
Yeah, I realize you didn't ask for this rant, but I am glad someone kicked me into a higher consciousness years ago even when I was not ready to quit. But the seed was planted, and I am so grateful it finally sprouted. Hope all the salt air and the fresh breezes let your no smoking see sprout too.
Best wishes.