Robert,
As you get advice, keep in mind that "winter" in Michigan is very different from "winter" in Georgia/Carolina. The difference can be temperature (35F vs -10F), rain vs. snow, 1" snow vs 12" snow, etc. Of course, a 35F rainy day can be as dangerous as -10, but it takes different strategy. I often check the poster's location in their on their profile. I live in PA, but used to live in northeast TN.
Also think about how much hiking vs camp time you expect. Do you hike fast, far and carry lots of stuff, so you'll be more likely to work up a sweat? Will you be out for 1 week, or just overnight trips so you don't have to worry about drying out down?
I get cold easily, so carry more clothing than most. For a more mild, rainy winter I like thin base layers if it's 20F, but above that I don't wear any base layers on the bottom because I tends to hike lots of hills. 30-40 F is very common for my winter hiking. A thicker fleece or another synthetic shirt with a wind shirt works while hiking. I keep a thin hat and liner gloves handy (those items are SO versatile). If rain is in the forcast, good raingear is important.
At camp I have a heavier wool or synthetic shirt to change into (a BPL or Patagonia hoody is nice). A puffy jacket is important for me. Maybe thicker gloves/mittens and hat (balaclava is better) if it's cold (<20F). I recently got some synthetic Montbell Thermawrap pants to wear over the thin liners, and really like them. When it's cold, some down booties are appreciated around camp. Warm, dry socks are important in the sleeping bag.
Always keep your camp clothes in a dry sack since cold and wet is a BAD combination. I use a liner bag AND dry sack. Down is great for me for it's weight/warmth and volume/warmth ratio since I'm usually doing 1-2 nights, and don't have to worry much about losing loft.
I still use sneakers and relatively thin socks while hiking since there usually isn't any snow on the ground. I might upgrade to heavier shoes, gaiters, and rain pants if snow/rain is on the ground or in the forecast. Rain pants
Try some different combinations and sit around some winter day/night, or better sleep in your backyard to try them out.
Tom