I lived in Montana for 18 years. So, I'm no stranger to cold temps. Befor you go make sure your antifreeze is fresh. I may be wrong but a 50/50 mix of antifreeze and water should give you the best resistance to freezing. I would also buy some additive for your gas tank. Any water in your fuel system can freeze in those temps, leaving you stranded. Getting yourself a strong, new battery and some new battery cables might not be a bad idea either. And don't forget your jumper cables. If you've never been in weather that cold you won't believe how fast it can get to you. It seems like I remember a gadget snowmobilers used to use that might come in handy. They had a breathing apparatus that directed their breath outside the helmet, might help with the ground glass fogging. Might look kind of dorkey but hey you'll be the only one crazy enough to be out in that weather anyway. Have fun!