I think they are on the increase because I have fished ther for 35 years and have only seen a few up until 7-8 years ago and now I have seen 4-5.
My brother got a 48 incher in the trent at the mouth, I raised a nice 45 incher at the mouth of the Moira a few years ago.
Up river in the moira and trent there are good places with nice sized fish as well.
I really am surprised no one has popped a 50lber trolling toward the bath power plant in the fall while fishing eyes, St Larry isnt very far away from that.
For the brave at heart I have heard of large fish being hooked out near the Duck Islands...but thats a real needle in the haystack!