Welcome to the Tall Tales series of Geocaching.
Please don't goto the posted coordinates, you won't find anything there. Get the real coords by keying in the word (all lower case) into the certitude and it will spit out where to find the cache.
Mike Fink, called "king of the keelboaters", was a semi-legendary brawler and river boatman who exemplified the tough and hard-drinking men who ran keelboats up and down the Ohio and Mississippi (key this into the certitude to get the final coordinates, not states, not ponds, not lakes, put it in plural).
As always, be safe, cache at you own risk, bring your writing apparatus because this cache don't have one in it.
And most of all Have Fun, this is caching after all.
This cache should be easy to find, but Mother Nature might put a damper on that.
You need his last name for one of the caches in this series, for the certitude.
rivers
You can validate your puzzle solution with certitude.