You've heard the old saying: Lay out everything you think you need, then put half of it back in the closet.
Or the other one: There are two types of travellers. Those who pack light, and those who wish they had.
Seriously . . . unless your suitcases are tiny, I'd suggest that you re-evaluate what you're planning to bring along. You really won't need more than two suitcases of clothes per person, and it'll all be in your way in the stateroom.