We have friends that travel all over with only carry on luggage. They are thinking about MUSH!
But, they end up doing laundry every other day. On a two week cruise at an hour and a half for washing and drying that is almost a whole day out of the trip. I'd rather pay the overweight charge (and have yet to do so!). With PIP being a warm weather cruise, the clothes are pretty light so there's room for toys!