Yes, I would put some serious reinforcements in the hull, especially under the water line. A couple of strips of fiberglass along the keel and fiberglass cloth along the hull sides as well so you don't get a print layer crack if you hit something.
This also reminds me of a to-do, I have to take care of CAD'ing the rubber dampers for the hull edges now. Was thinking of printing them in flex, that would be cool! (Or printing moulds to make rubber casting). But these dampers would really be useful on such a big model if you run into something, not just for cosmetics.