What about nightcrawlers? And maybe instead of putting a gob of them on your hook, (which you should also try), maybe try fishing it in a worm harness setup like you would for walleyes or bass? I don’t think there is really a fish in the water that would turn down a worm if you put it near the fish, in ideal conditions anyways..
I grew up fishing with chubs and crawlers on the Minnesota with my Dad and we always caught lots of fish.
Anyone having luck finding big chubs? A lot of people I know are only getting small ones.