That river is filled with snags. I waded on Saturday for a little. A power fish outing, had 3 hours to burn, My wife told me to go to Arthur, but pretty much enough time to get there, launch, then pull the boat and drive home... I figured I'd drive out to Smithton (1/2 hour each way) and rush through a few holes that usually hold fish. I landed one... Had one other spit me out. 2 other bites total. I did all Senko/Dingers. Those things even hang up a good bit, even in the chest deep holes that I am not going after them in waders. The leaves were starting to be an issue, which will be a real issue the next few weeks. Amazing the difference from Arthur to Smithton in the foliage right now.
Not sure if you are using split shots while drop shotting? If not, they are a good way to adjust size/weight and will often be able to pull the rest of our rig free if the weight gets stuck. For live shiners, I'd personally go with a three way swivel over a drop shot, which allows your shiner to dart to the sides a bit more and somewhat avoids line twist and tangles. Can't say that I have used them much in current like that though, but I think they use in places like Niagra River which is far more current.
I usually keep some 1/64, 1/32, 1/16 & 1/8 jig heads with me. More for panfish, but you should be able to experiment with them on what seems to get you far enough down, but not hung up?
Having 5-6 different size split shots would probably be the easiest way to dial in weight, then go from there.