Each person is allowed up to 200 pounds of personal luggage on board. However, if you are traveling by air, ask the airline if it has different restrictions. Airlines and NCL have limited liability for loss, so be sure all baggage and personal belongings are properly insured. Suitcases should be securely locked and tagged. You should hand-carry medication, jewelry or other valuables and important documents.
We've got our luggage down to one large duffle bag on wheels with a handle.....and two carry ons.....it took 15 cruises to get it that point though....so much you bring that you never wear...Happy Cruising....Alaska is Outstanding...
make sure your luggage is squishy so it will store under the bed - friends had big pull bags and they wouldn't fit under the bed so they had to work around them all week in their stateroom