You meet the nicest people
Canoeing down a river in a small flotilla is an ideal way to get to know people. The pace is slow and the difficulties are shared. If you don’t know these people on the first morning then by the time you’ve paddled a day or two with them you will be remarkably close.
Those shared little mishaps, the picnics and the shared experience of seeing the world from a new perspective will bring everyone and anyone a little closer.
A shared glass or wine at lunch-time helps as well.