100 is probably conservative, I worked in the Great Dismal Swamp for 7 years. And yes skinny is a reliable identifier, when it comes to cottonmouths. I know you didn't keep a journal, but I am still curious about your personal experience with cottonmouths, as opposed to Google experience.I seriously question that you've been exposed to 100 of them. "Skinny" is not a reliable identifier of any snake.