I'm making a new canoe. My local river is navigable all summer, but has many boulder-gardens, so I prefer to run it with a very shallow-draft canoe, and one in which I don't worry too much about scraping over a rock. I avoid paddling it with my good prospector.
So a few years ago I designed and built one to match this requirement for solo paddling. It's 15' 6" long (the length of 2 ply panels, scarfed). And it does very well! But it draws too much if 2 paddlers get in.
Thus, I worked up another that draws 3" with 2 adults and a bag or 2 on board. I bit the bullet and made 2 scarph joints in each panel.
38" beam at gunwales,
31" beam at chine
3" rocker at each end
1/4" underlayment ply
chine logs and outwales from a 20' spruce 2x10
polyurethane glue, screws, ringed bronze boat nails
Anyway, I used a 2-part tackle to turn it, and when it was aloft, I admired the shape.