This video from Mossy Oak shows this very large cotonmouth. The largest ever reported measured 71 inches long. Not sure how long this one is but wouldn't want to encounter it in the water. Cottonmouths are known from being aggressive and protecting their area when encountered. They are posionous but luckily bites are rare and can be treated.
I have always loved camping, ever since I was eight, and was forcibly stuffed in a trunk and dropped off in the middle of the forest. My dad was a complex man, but I believe he was trying to show me the value of camping.