Hmmmm. Not sure I am clear.

Is this list just your kit to be used only in emergencies, and not part of what you intend to use along the way?

Are you carrying other things to address the ongoing regular need for water, shelter, fire, food, first aid, navigation, signaling, hygiene, and morale?

To me, minus 20 plus wind chill from 40 plus mile an hour winds is pretty serious stuff to contend with for 4 days. Will you have re-supply and shelter options in the towns you visit?

Am I correct in reading the scenario that you expect to travel less than 3 hours per day? Are you going to camp out nights?