Since it's a car kit you should have plenty of space. I would ditch the button compass in favor of a full size Silva or similar model. Add a handsaw and axe for firewood, and consider tire chains if the weather calls for it. A good heavy-duty tow strap as well if not already part of the tool kit. Several Bic lighters and a couple of cans of Sterno could prove useful. I don't know how handy she is but you should include a spare fan belt(s). Even if she isn't capable, somebody who stops might be. Oh, and add a bottle of Potable Aqua or Micropur tablets, a good flashlight or two, and some hiking shoes/boots.