Without shelter, you won't be building a fire in many cases.
Wait till you get stuck in a whiteout on Tinkers Knob with 100 mile an hour plus winds and mixed snow and rain.
Or ride off the backside of Alpine into
powder so deep you can't walk through it without skis with skins or snow shoes.
Many years both these things happen to people.
If they are smart, they build a shelter and signal for searchers. Sometimes they can build a fire, most can't.
I do remember a pair of snowmobilers that managed a fire
by soaking their underwear in gas and using that for a
starter.
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You will have a long walk to start a fire with Redwood Trees,
say across the central valley.
I'm not questioning the need for shelter. Nobody on this thread is as far as I recall. In contrast, some here are questioning the need for fire. That's the issue.
I know many people here are binary thinkers, and that's good sometimes. However, here's not the place. Shelter is necessary most times. Fire is necessary sometimes. Both fire and shelter are necessary sometimes. It's not a binary solution.
Regarding Tahoe, whatever you want to call the trees in Tahoe, there are lots of them. It may require higher skill to start a fire with them in the winter, but it would be possible. It's a different situation than having no fuel at all.