As a kid in the 70's I used filters off of cigarette's some cotton balls and headphones fixed to a hardhat, now use foam plugs and going to try some Walker headphones with walkie talkie's with the grandkids, still got pretty good hearing
Got a Northern hole, use the whole kitchen spoon holes drilled on both ends, one for the hook and one for the line, leave it silver, they will like it. PS, the bigger the spoon the bigger the fish
Years ago there was a bunch of guy's that fly fished a t Northgate Dam and they were from Bismarck, those guy's could really catch the Walleye's, they used tubes and frog feet to get around