That is pretty close to what I carry, along with flares, flashlights, charcoal and a flat pan (for heating the oil pan when it is really cold (-30) out). Tinfoil, a shovel, spare cell phone battery, flashlights and spare batteries. A couple changes of clothes, extra (thinsulate) gloves, insulated coveralls, wool socks (2 pr), and a pair of pac boots round out the kit.
But then, I live and work in North Dakota and winter here is nothing to mess with.
Up thread someone suggested walking out. Not here. That just makes the body harder to find. Stay with the vehicle unless it is somewhere it absolutely cannot be seen. There is a lot of material in a modern vehicle that can be used for insulation or burned for heat/signal smoke in a pinch. If you set fire to your spare for a signal, make sure you let the air out first (cut the valve stem off).
“But then, I live and work in North Dakota and winter here is nothing to mess with.”
I’ve heard stories of back in the old days of tieing a rope between the house and the barn for snow and dust so you wouldn’t get lost on the way.
A few years ago in the hills of Oregon a couple got lost on a back road and a snow storm came in. After several days (maybe even a week?) the husband tried to walk out. Several days after he had left the weather broke, and somebody came across the car with the wife still in it and alive. They found the husband’s body in the spring, not too far from the car.