Winter camping

Last night, I had a brief chat with a friend over winter camping.  It looks like we are going to head out into the cold of Ontario winters this coming winter.  I started now to think how I am going to shoot our first time experience in the wilderness of Ontario at -20C.  I have taken my D80 out in the dire cold before but only for a couple of hours.  How will my D7000 or D90 fare in -20C temperatures?  I kinda like to do lapse photography, setting up the D7000 on a tripod and have it fire away every minute or so.  I need some way of protecting them from the elements.  I will also like to bring a camcorder, which has never been stress-tested this way before.  I will jot some notes down on this blog from time to time as I build my list of things to do and things to bring.  For one thing, I will surely bring my new GPS unit along so we will know exactly where the photos were taken.