i use to get the frozen ciscoes at the bait stores around grand marais, but they turn to mush too fast, so i went to frozen sucker minnows 4"-7" size years ago. and my group does as good on suckers as we have on ciscoes. on some opener trips in the BW we've dip netted our own suckers(which are #1-#5) and have just cut a chunk of meat out and put on a hook. my deadbait set up is as easy as it gets. #4 or #2 hook with egg sinker up about 18" or so and held up by a baby split shot instead of a swivel . hook through the skull so the point of the hook is up and out the top of the skull.
the hard skull is 1 reason why i like using suckers, a person does need to check there deadbait set up from time to time and recast and the suckers stay on a hook much longer.
in my previous comment i stated i pack 6 suckers in a zip lock baggie with alittle water then freeze them in layers in a small 6pack type cooler and have bait for the length of our trip.
mainly for lake trout in the early spring, but pike also and depending on the timing of ice out we've had some years getting a few walleyes on this set up daily.
going in and out of the rocks in the BW i prefer #12 or #14 mono for my shore set ups and i,ve read some people will cut a slice in the belly and add a packing peanut for floating the minnow up a little off the bottom, all though i have never tried it myself.
a couple of pics of deadbait caught fish.