
I've said it a thousand times. GPS is not a valid form of navigation and never a back-up plan for the lost. They run on batteries which die. Especially fast in the cold. They can be dropped and broken. They also count on getting a signal from towers and satellites. With a map, compass and some basic navigation skills you're much better off.
These people got lucky.
http://www.startribune.com/nation/80213347.html