You have to make a heat potion, I don't know how, but you can search
You also have to talk to scar back at the camp and tell him you're leaving. But I did that too and it's still not letting me go. The mountain that has the option to try crossing it but it tells me I'm going to die if I don't turn back. Wait do you have trousers or do you have a coat? I have a coat not pants. Are there two items We have to wear?