From what they told me, the winter course content is very similar in content to the summer course except for shelter building and clothing differences.

Mors also does his little trick by creating frozen boots that keep his feet warm. Apparently, with 3 pairs of wool socks on his feet, he dips them into an hole in the lake and freezes the outer layer. It takes a few minutes but after that the feet stabilize in temperature and the icy outer "boot" becomes the insulator.