I remember a few years back my grandfather, 83 years old, took a trek into the back country of WV. He was planning to live for a few days in an old log cabin he grew up in. He got there and found the cabin had fallen down due to disrepair. A ice storm followed by heavy snow had started just after he left. He started back home but the snow and ice became too deep to travel. He backed up a against a cliff face, built a huge fire and survived five days with him and his dogs in what was later called a blizzard.
He was surprised anyone had been worried, just a little snow was his off hand remark. Modern people are tougher than we think, I am confident that under similar conditions I could have survived as well. His dogs killed and brought a couple rabbits rabbits into camp which he cooked before the fire and shared with his dogs. They kept warm in a pile against the cliff and in front of the fire.
Attitude has a lot to do with survival, being prepared at least minimally is a bit of an obsession to me and many of my relatives. Nearly all of us carry, fire, a decent knife, and an attitude of being will to make a decision that allows us to do what is necessary rather than what everyone else thinks you should. Of course where he was at lacked ay dangerous animals but the presence of fire and dogs would have helped with that.