I am an outfitter on the Buffalo River in Arkansas. And the very first thing that should be told over and over after being told to use your PFD is to stay on the up river side of a canoe if it goes over....especially in fast water to avoid being pinned between the boat and an object like a rock or tree.Youd be surprised to know how few people either know this or can answer which side when asked. It should be reinforced whenever Scouts go canoeing. You have some time to get under the canoe and/or push it over or away from you. Id be curious as to if the group had throw bags for rescue. A throw bag is an inexpensive piece of rescue equipment and can be used with a caribiner to move a boat. You should also consider having a hack saw in your rescue bag. Sometimes the saw is the quickest way to save someone trapped behind a boat by cutting the canoe in half. The saw will rip through the hull quickly opening it up.We should all know a canoe can be easily replaced.