Part of proper planning, to say nothing of exercising a reasonable amount of common sense, would be never going off on a dayhike with only a Leatherman. In your scenario: If, as you should, you have the "Ten" Essentials with you on your day hike, you might not be comfortable, but, if you keep your wits about you, you will survive the night!

_________________________
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey