fun but full of plot holes

HE MEANT MOTH HOLES...HE IS VERY OLD AND WATCHED THIS ON A PROJECTER.🎦

one I was thinking of is: why not just walk? Strathairn literally walked to the end _before_ they got there, so why even go through that by boat? maybe the point is to get the boat through it so they can boat the rest of the way, fine, but there's this thing called "portage" which is exactly what you do in these situations.

I think that was the writer's primary challenge: how do I make it so that they have no choice but to go through this by boat? So that is partly why the third guy was shot, so he couldn't walk. But then he was eliminated. But once it was just the two bad guys they could have just walked around the hard parts.

(I now see this has already been mentioned here a few times.)