I made a Birch Creek Malamut canoe - 4mm ply stitch and tape - and it was excellent! I canoed on the sea, lakes and even grade 3 white water in it, guided tourist groups on the Teifi, did multi day river descents, sailed her - the lot
Rot eventually got into the wood but that was after many years of hard usage and outdoor storage.
The plans I used were full size paper patterns, so life was easy
and I had help from my boss who ran the tourist trips and from Alan Bridges who designed the boat and made the patterns. Unfortunately the have both died since then and I do not know if you can find the patterns anywhere now.
All my photos of the boat (originally called "Honey" after the colour of her varnished woodwork then after multiple repairs I painted her black and renamed her "The Black Joke", had Skull and Crossbones on stem and stern and a pirate flag as a sail to replace the multi coloured beach umbrella fabric of her original sail) are on transparencies and I cannot post them