Welcome to the forums. I'm in central IN, 66, and have waded creeks for many years. Ankle and knee issues have really limited me the past couple of years. You're exactly right about big smallies liking wood (no coincidence that it's most always on the outside of bends). Glides above riffles where the water is knee deep and rocky have produced some good ones, too. You'll see a lot of 5-6 lb. smallmouth on here but as you said a 19-20" creek smallie is a whopper.