you should time your entire canoe trip to the golden hours and carry an entire studio you insensitive clod! ;-)... hehe kidding aside yeah its weird that people don't get there are many use case scenarios where you cannot control things and while not everything, a high DR helps.I always carry a studio flash with me in my canoe
Seriously though, sometimes you don't have the proper gear with you, and in the case of flashes, often you are not allowed to use one in the venue. And often you are confined to shooting from a set position and the lighting of the scene is something that you have no control over. I can't tell you how many times I had a flash sitting in my bag and was not allowed to use it
oh and don't forget to put a reflector against the birds in flight it will help tremendously!