Continuity mistake: In the scene where Lewis and Ed are in the canoe after setting up camp and Lewis is bowfishing while Ed is drinking beer, Lewis shoots a trout. You can clearly see the arrow hit the fish just behind its head in a close-up shot. When Lewis pulls the fish in, the arrow is through the middle of the fish's body.
Trivia: Actor Billy Redden (who portrayed the inbred hillbilly banjo player) actually could not play the banjo at all. Despite training for the film, Redden's hand movements simply weren't convincing, so a local musician was hired to hide behind Redden and portray the left-handed fingerplay in complex banjo-picking shots. We only see the briefest snippets of Redden handling the banjo with his own two hands; however, when the iconic "Dueling Banjos" scene reaches a fever pitch, the left hand seen working the banjo frets is that of the real musician hiding behind Redden.Charles Austin Miller