Chimpac
No , I am not trying to insult you, you are doing just fine.

Please read this very slowly and think about it.
What you do is CAMPING in a forest, not BACKPACKING and not HIGH ALTITUDE CLIMBING.
There is a subtle difference between those activities and if you do go from one to the other without knowing, you can ,and probably will ,die.
Experienced climbers with EXPEDITION grade gear die in places like that .
A very simple reason for example is that winds of 100MPH are not that uncommon. That will lift a fully loaded person up in the air .
At that point you have no choice but following the wind, could be out and a few hundred feet below.
With winds like that, temps at -40f and below and possible snow drops of several feet per night you will never see anyone that has some active brain cells , using a tarp, ANY tarp.
And we already have covered before the point about keeping warm.
Climbers need clothing to keep them warm. They don't carry stoves with them going up a ridge .
And even at base camp, once your stove goes out you still need exactly the same clothing/bag as if you had no stove at all.
So your stove and your chimney are totally redundant above base camp and in fact anywhere above the tree line and of course where you are not allowed to bun wood .
(a lot more common than you think...)
Franco