Canvasing
I am by far the least experienced to be offering advice; I have canvased just one canoe and it will likely be my last. But when I was contemplating the job, I realized I just didn't have the space or inclination to rig up a system of come-alongs or other mechanical aids to stretching the canvas.
All I ended up doing was after tacking the central third of the boat (upside down on stands), I rolled up the extra canvas on each end vertically as tight as I could, so that the tension held the canvas against the stem of the boat. I kept it there by using a single ratchet-style clamp. Think of rolling a towel as tight as you can , then clamping the thing in place. You clamp the canvas only, you don't need to clamp it to the boat itself.
As I worked over the boat getting the small puckers out and retacking several times, I would go back to the ends, release the clamp and retighten. After doing that several times until it was as wrinkle-free as I could get it, I wetted the boat slightly, pulled and retacked everything one more time, and it was done.
I feel like it came out very well, with no wrinkles or even small puckers left.
Again, just a thought..