Are you talking about carrying on the ship or plane? If ship, they should be ok. They do have to fit through a security screening just like the airlines. If your hanging bag is one of the smaller, soft folding type it should be ok.
I don't know which port you embarking at but at Ft Lauderdale last year there was one agent that wouldn't let us board with that size bag & we had to check it. We've been there 3 times since without any problems & gone right through the security check-in without any question.