Nah, you don't need the scrib - as I said, the items are fine, as long as Havok holds up they should do precisely what they're meant to do and if they get thrown overbaord, that's fine
The main problem is the player and NPCs (after all, it would be nice to have a crew), I suppose it is possible to put an inviso box around the player or just make them stick to the ship (like in Fishing Academy) but it just sort of takes away.. it would be nice to walk about the deck of the ship whilst you set it to sail straight ahead

But if there's no other way, then... well, inviso box it is.
The interior is a whole other cookie.