Thanks guys.
I've got a wool balaclava like the first one in your link Coyote, and am pretty
comfortable wearing that.
Silverback, got lots of wool socks, and will be doing that.
I'm not too comfortable with mummy bags, but have a light one that I could
put inside my larger sleeping bag for added warmth if needed.

In the winter camping vein, there is a snow shelter contest going on over at
Bladeforums that I've decided to enter. You go and build an "all natural"
survival shelter, and spend the night in it.
Good test I think. I've already started on my shelter, will be finishing it
up either this week before Christmas, or next week, and am hoping to spend the
night in it next week sometime.

Cheers