Are you walking or driving across Russia?  My advice? Stay in the frickin truck!
If you like to camp, then since you've got a truck, bring Li-Iron batteries and plug them into heated gear when in your tent ... or be smart enough to bring a truck/Van you can sleep in.
It's so easy. Next day, charge them back up when on the move from truck elec. system. It's basic.
I spent 2 years in Antarctica with US Antarctic program. I did field party support on several occasions. Temps were only minus 20F. we used cots in the tent to stay UP off the ice.
We also got Crevasse rescue training from Brit Antarctic Survey guys. Luckily never needed to try it out.
If you plan to hike for days away from your truck ... we'll, you better leave that truck someplace SAFE ... or it will be stolen and stripped in 10 minutes.
So, stay in or near your truck ... and when you want a real adventure ... get on a bike and try it.
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