I really like Mysta Hyttet and I can see your love and knowledge for ale comes through. The rules for hypothermia are fun and I would think works well. They do what I tried to include in my random table, adds some flavour and fun without hurting anybody.
In general your DR-checks could potentially be a little on the high side, but that's just up for play testing.
All in all a great adventure for dropping between two places, something you as a GM always need. And the setting and atmosphere reads really horribly. (in a nice way.)