Thats not fair, you have an Aquaskinz! I'd sink like a frozen rock
Seriously though, if you were to kayak in the winter, what would you need to not make it foolishly dangerous? Neoprene waders, belt, and GOOD pfd enough? An Aquaskinz would be nice too. The place I'm thinking I'd never be all that far from shore, and I think you'd want to go with another person in case of an emergency. My kayak is a Loon 16T, 16-foot tandem, which is more like a canoe, very stable and I've never tipped it.