Visit the Team Iceshanty Proshop
Cheese cubes, they gorge on it and get little pot bellies and the cheese makes em stinky!
One more little secret, last year I took a 5 gallon pale w/lid and drilled a bunch of 3/16" dia holes in sides, top and bottom. I store my bait from one trip to the next in the stream next to my house. Bait stays nice and healthy all winter long. Down side is it can be a PITA to get the bucket out when the stream freezes over. Much better than changing water in tanks airaters and filters though.