Perhaps a bit late in the fur-trading years (early 1500's to mid 1800's?), but how about captain Samuel Mason, a militia officer who became a river pirate?
Click here, here, here, or here...
For a more whimsical look at river piracy, click
...
"Dying is a very dull, dreary affair. And my advice to you is to have nothing whatever to do with it."
"I am ready to meet my Maker. Whether my Maker is prepared for the great ordeal of meeting me is another matter."
This episode of South Park says it all:
http://www.southparkstudios.com/episodes/220764
(Be patient; the site might be a bit slow. If nothing happens, click on the icon of Cartman wearing a pirate-hat)