I was able to sneak away from my family for a couple of days this week, just before the really cold weather set in.  It was -24C, -29C at night, but warmed up to -11C yesterday before the deep freeze hit last night.  It was very peaceful - clear dark sky, with no tent to disrupt my upward view.  It warmed up in the middle of the night, and I had to sleep with my head outside of the bad to cool off.  Until I woke up with a head full of snow that is.
http://myselfreliance.com/winter-backpacking-the-western-uplands-trail-to-ramona-lake/