I tried shrimp the first year i got into koke fishing after reading about it in the book "Kokanee" by Dave Biser. Didn't catch many kokes that first year but i think it had more to do with me not knowing what the heck i was doing. I've never bothered useing shrimp since. After fishing yesterday i'm not all that convinced that corn is that important either. After switching to just gel scent on the jigs we caught them just as quick as we did useing a couple kernals of corn, small piece of worm, and the gel scent. Not useing bait made absolutely no difference.