I would not canoe this trip with my little guy again. As soon as we started I noticed that the speed was fast enough that if we overturned I would have to choose between my son or the canoe because the river speed is fast.
You also have to watch to ensure that you find the channels because the speed is fast enough to damage your canoe.
I recommend this paddle to people with a tough canoe and good skills.
You MUST exit before the weir or you will drown. Unfortunately, Calgary put in a weir just downstream of Princess Island Park to divert water to irrigation. If you go over it there is a 90% chance you will not survive.