I have not, survival skills are a neat facet to learn in life.
But to be put to everyday practice I could not do.
It is nice to think of putting oneself into such extremes.
I have taken many tips and such through the yrs and applied as needed, but most were done in practical manner.
Could You get by if dropped into a frozen tundra with limited supplies?
Would You want to experience such a test?
I'd learn, fast! I'd kill a few rabbits and wait for the wolves and feed them and the crows. My eyes in the sky and on the ground.
What's your best skill?