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Staying put would have been best

Missing California father found dead Lost in snowy Oregon canyon; wife, two children found alive earlier

It’s sad when someone who cares enough to try anything to get help for his family ends in tragedy. The best advice is always to stay put, but I am sure that is easier said than done. Make the best use of the best shelter you can find and focus on survival. In this case the car was the only place to be. He is a hero to his family none the less.