This sounds like a great adventure!
But you know, you should always carry some emergency sugar stuff! You can survive for days without insulin. But if you are low, having no sugar can mess you up pretty quick.
Try Transcend gels.
Very compact and waterproof. And you can just secure it in the canoe under a seat, and never have to worry about it, and it will be there if you need it. The expiration dates are usually about 3 years, but you can ignore that date because they basically last forever!
Same thing - put one in your back pack, and in your car!
Sorry, don’t mean to lecture. 