Everybody absolutely must have recovery points front and rear. So that means at least tow hook(s) in the front and a hitch receiver in the rear.

Shovels. Folding and full size.

Waterproof clothes and/or a change of clothes.

Be prepared to stay out there several days...sleeping bags, food, water, firestarting stuff. Think Oregon.

A snow sled and rope. Use your imagination...

Camera.

Have fun.