Be gentle. It'll come apart. The great thing about Enfields is that you're not going to be seeing a dozen others just like yours at a vintage rally.
I'm considering rigging my boat for sail. I had a wooden boat builder look it over and give me an assesment of what I need to do to finish it, and I asked about setting it up with a mast. He said that was very feasible, and with the shallow keel on the thing, a centerboard wouldn't even be needed as long as I'm not too ambitious with how much sail I rig it with.
I also want to rig a sliding seat for proper rowing. I used to belong to a rowing club, with the little racing shells.
I admire cedar canoes, and congratulate you for building one.
Where are you in North Dakota? I have a cousin in Fargo.