The whole eating snow thing is a bit of a myth. I've done it many, many times. The dogs do it all winter long--won't touch water. You simply need to have enough caloric energy to melt the snow in you. If you're really on the verge of hypothermia, adding snow might be a problem. But then again you're probably doomed anyway if you're that close to losing your core body temp. If this guy had enough energy to walk 20 miles out on day five, he had more than enough to melt snow in his gut.
If I were surrounded by a pack of wolves I and had a gun I'ld shoot some
If you are surrounded by wolves, you are unlikely to ever *SEE* them. Though you may hear them howl.
Here are some pointers I've picked up:
Don't rely on cotton clothes too much. Never go into the woods in blue jeans and a tee.
Wool is good, but heavy. Nevertheless a pair of wool surplus blankets are a slice of heaven.
Fleece polypro pants are glorious and wunderbar
It's impossible to be totally unhappy wearing a good pancho.
Duct tape is good, but electrical tape often better because it stretches.
Wicking socks are fantastic
Good boots appropriate for the climate are invaluable.
Never try to sleep directly on frozen ground!
Layers, Jerry, LAYERS
People don't wear enough good hats
Walk slowly and watch where you're going. Avoid sweating.
Learn to use maps.
Also, what's all this focus on fire building? People tend to fixate too much on building fires when they should spend the time building their shelter and bed. That fire will go out at three AM even if you get it going good, and you can't sleep in it anyway so 99% of the heat is going to get lost out there. Focus on constructing a bed and shelter that will conserve the maximum amount of your own heat possible.