So we did the smaller boat, where you get "less" wet. It was only me and my family so we all sat in the back row. Daniel was our driver and he asked us how wet we wanted to get. So we picked medium because we wanted to get lunch after.
He takes you around the St Laurent and does a bunch of 360 degree turns in the water. those are where you get wet. It was a blast though. Best half hour of the trip for sure. I'd definitely recommend if you have teenagers/kids because my brother and I definitely appreciated doing that over the slow boat ride my parents originally had in mind.