I always carry a survival kit and a first aid kit with me.....depending on how cold it is i might make a fire or might just bundle up (if its cold weather hunting you are usually dressed for it, the temps arent going to drop much below what it was that morning or late evening, so if you were warm then youd be warm overnight). Depending on which treestand i had, i might set it a couple feet off the ground and sleep in it with my harness holding me in. Honestly i cant imagine a situation where i would find myself having to sleep in the woods, i always know my area, carry gps and flashlights.....just dont see a scenario where id sleep in the woods vs walking my way out, even if it was dark.