As I lay there in my super-duper borrowed-from-the-Army mummy bag, I had time to think about things. Mostly, I pondered how stupid I’d been to take a dog team out across the North Slope of Alaska in November.As I can now contemplate, 50 years later, it was a dumb thing to do, making the first crossing north to south from Prudhoe Bay’s frozen oil fields to the Brooks Range. Brooks Ran...