Welcome to Michigan. There are some great trails in the Lake Superior area. For winter camping insulation I usually bring 2 baselayers (merino 150 and a heavier capilene 3) a windshirt (patagonia houdini), and a light down pullover for in camp(pata down hoodie or nunatak). This takes me down to -15 F pretty comfortably. If planning to be stationary in sub zero weather (I took up ice fishing when I moved to the midwest), I'll throw in a nanopuff synthetic pullover or a light vest as well.
My sleeping bag is a WM Puma (-20 F bag). This is overkill even in dead of winter here, but because I do all my camping solo, it does give me the security that I will never be cold regardless of weather. With the layering system listed above, I have used a 20 F bag down to -11 F, but I think a 0 F bag would be perfect.