Luggage: soft, not hard
Boat crews stack bags on open decks and hand them across gunwales. A 40–60 litre soft duffel or backpack survives that; a hard shell gets scuffed, does not compress and is miserable on sand and cobbled village lanes.
Add a 20-litre dry bag for boat days. Spray comes over the bow of every bangka and longtail on every crossing.