Actually, the plans I have show a flat-bottomed hull. My real concern would be the compound curves and shape of the stern.
Years ago, some folks built a sailing raft out of PAPYRUS. They made it almost all the way across the Atlantic! With your "modernized" approach,...
I'm thinking of building a large, R/C model battleship. It would be ~16' L, ~3' W, & ~1.5' H. 6mm Meranti marine plywood is being considered....