Please welcome Eyoyo Underwater Fishing Cameras.https://amzn.to/3siEgXn
Going out on those big lakes by foot is way to much work, you need someone with a 4 wheeler atv.
A friend and I are going to the bay late February to try and catch whatever we can with Guide Josh Teigen. We are hoping to catch some trout and salmon, but would love to get some whitefish too. If you would like to join us, the trip is $450.00 for the day. We could split the fee 3 ways. He seems to do well catching all the different species there. You can research him on youtube. I have no experience regarding structure there, but have fished Green Bay for whitefish. We've caught them in as little as 12 feet of water. Not sure what kind of hike that would be for you.
I've not fished Chequamegon Bay for whitefish. With that said, I have fished Green Bay for for whitefish. There's a number of spots on Green Bay that you can walk out and catch a limit. Just look at the eastern side of the bay from Dyckesville (could maybe start further south, not sure) and go north. Keep in mind that late Jan or so you can usually drive your car out on Green Bay with plowed roads, if that would help you out any.Also, check out the whitefish forum towards the bottom of the main forum page. Lots of good stuff in there about fishing whitefish in WI.