Had to spend nite out in rockies once,had extra food ,3 ways to start fire ,flashlight,gloves ,knit hat,wind was blowing 30 mph ,and it was getting cold,I striped off my clothes to dry out,they were sweat soaked found a ledge out of wind found enough firewood to last all nite.built fire by big bolder pickupsized, got bolder good and hot.I had good dry clothes that nite staayed out of wind temperature got down to 11 degrees...flaged down Rockey Mountain rescue in morning got hehicopter ride out.....Dave