I love winter boating. Here in VA, "winter" ain't nothing compared to RedFox country, but there's nobody out on the water, and that's what makes it so nice. I suppose that's what makes it a little riskier too. If you just think about a worst case scenario before you go out, you'll do the things you need to do. Picture yourself out there with a dead engine or soaking wet in cold water, and imagine what you wish you would have done but didn't: file a float plan with someone reliable, have a working radio, have a cell phone with a charged battery in a waterproof bag, have a spare set of dry clothes, have a blanket (or better yet, a cold weather sleeping bag), have something to make a fire with, etc. -- you get the idea. If you get dunked in cold water, you need to get out quick. Once you get out, you need to get warm. If you're stranded somewhere, you need to be able to call for help and stay warm until help arrives. If you just walk through the steps in your head beforehand, you'll probably have what you need to make any incident a good story rather than a tragedy.
The risk involved is much less if you don't go out alone. However, I don't find a lot of takers on my boating invitations in mid February, and I frankly cherish the solitude of those winter expeditions -- so I can't say don't do it without being a hypocrite. But I always let someone know where I'm going and when I plan to be back, and if I change my mind about the route or return time, I call them.
Have fun!