Son, hunting partner and dog got lost navigating river in WMA in Arkansas one year. Son had to call it at dusk as they were running out of fule that they would have to spend the night in the boat. Pretty dangerous situation to be in as it was below freezing. They had cold weather gear with waders and they were dry so the night they were not in real danger but they were in for a chilly night. What helped was they were able to sleep on the fast grass of the blind and cover themselves with it too. And they took turns snuggling next to Rex, the lab. They also had a propane stove they could use if things go desperately cold but that never happened. From that experience, now those two always bring a duffle bag with them when they hunt which they call the Arkansas Survival Kit. It consissts of more warm clothing , a change of clothing if they get wet, an epirb, and other stuff to suvive in the cold or at night.