So i just reached December on the world im playing. after 4 character death, my 5 th character have been alive for a month, and this is the first time im playing on winter. i tried to google some information but there isnt much. my main concern is to don't die from cold when im sleeping, if thats even possible i barricaded all windows and closed their curtains, i read somewhere it helps. so do i have to spent 3 months around the campfire or i can be more flexible during the winter?