They do bunch up good at this time of yr. I have a few different ways of targeting them. My favortie is usung a bladebait, but also love using a small black hairjigs. When looking for them try and find deep humps and work them SLOW from every angle you can. When using livebiat i just use my drop shot set up and hang that rod over the edge of the boat and work a lure at the same time until i find them. once you do find them. try a small slider grub, hairjig or bladebait. they will all work good. Make sure you only lift the bladebait up about 6in off the bottom. As soon as you feel the blade viberating let it fall again. The grub and hairjig should be working so slow you can't stand it. If you think your going slow enough..guess what your not..Slow down somemore. Small lifts with your rod tip and reeling in your slack is what seems to work best for me. That is my favorite fish and time to fish for them that time of yr. i know this may sound nuts to you, but also don't knock it. try using some of your ice fishing gear to. jigging rapela's, and hopkin spoons can be deadly once you found a good school of them. i have had some 5 fish bags in the 20lb range on average using all these tactics up in ct. best of luck finding them and when you do..Have fun bud!!!
Opps..ialmost forgot about the spidergrubs!!!