We always travel carry on and use the ship laundry - I send underclothes (hand wash those I care for that way at home), pajamas, casual shirts, casual shorts with instructions warm wash. So far nothing has been ruined. We also wear fabrics which can be washed in cabin and dried on hangers (use metal hooks so they can be hung from the ceiling to dry). Dress clothes sent for dry cleaning if needed though they really get that dirty. This has worked on trips as long as 30 days including cold and warm weather destinations. Good luck.