40 leaky rivets is no big deal 3 hour job once you have access. I would be concerned about the hull leak which if a crack is the culprit then a aluminum doubler repair would be required.
I used to fish Lake Simcoe and French River but I wont pay those ridiculous park and launch fees on lake simcoe so it leaves the French river which I have been fishing for the last 35 years and I love it.
Extraordinary times call for extraordinary measures and don't get me wrong I love fishing as much as anyone on this forum. If you don't like it run for office