Ok, maybe if they jump or fall overboard there is a chance they are able to swim to some isolated island and live a while on fish and coconuts until they are rescued back by their cruise ship and the very handsome ship captain. Maybe they need to light a very big fire in order to trigger the rescue.
Maybe they take a sketchy discounted tour and crashland on a random abandoned or undiscovered island.
I like the idea of making a big fire to get rescued. Good idea
Mostly it would be a cruise pack, one part ship experience, one part cruise port experience.