The less clothes you take with you to sail, the less chaos there is in your cabin. Keep in mind that you hardly need any walking clothes while sailing and that there are not many clothes racks on the boat. By the way, there are towels on board.
A suitcase takes up too much space in your cabin - you'd better take a foldable bag / duffel bag or backpack with you. For products such as sunscreen, shower gel and detergent, you can also organize yourself in the crew chat and collect biodegradable family packs together - the environment is happy about the minimized packaging waste.
Click the trash bin when you don't need an item.