Andy Poss knows the Tennessee River’s Pickwick Lake from top to bottom – literally. Fishing for both largemouths and the scrappy smallmouths, as well as crappie, is what he does now. For 15 years prior, he probed the lake from bottom to top to make a living. Poss was a commercial fisherman and mussel diver during those 15 years until, in his words, “I got tired of being wet all the time. And it’s a lot of work to handle 2,000 hooks a day – baiting 1,000 hooks and then taking up 1,000 hooks.” During that time, however, he added a wealth of knowledge about Pickwick to what he…