Scenario: Snowmobiling for 4 days in very cold weather -20f with wind chills from 40 to 60 mph wind. Distance will be about 90 miles per day from small town to small town. Desolate area between towns with occasional riders on the trails. Gear capacity is limited to large back pack with half of the space allocated for thermal underwear changes and minimal toiletries. Party size is two men.

My kit so far:
PLB and Sat phone w/ 3 batteries.
Current paper trial map and compass.
GPS with trail map
MSR Dragon fly stove and small fuel bottle.
Minimal utensils (cooking pan/pot).
About three meals of mountain house-type pack food.
Windproof matches
Regular matches
flint steel, dryer lint, magnesium chips, permalog type emergency tinder balls..
Pocket knife
Aircraft duct tape and foil tape
small foldable shovel
15' tow strap
signal laser (red)


What items can you think of that I am missing?

Any items in my list I should omit?

Thanks in advance.

Craig