First I am in full support of the Boy Scout motto.
I disagree with a couple of the author’s suggestions tho. I would never advocate using a can of Sterno inside a car. If the can gets knocked over, accidents do happen you know, you will stay warm. For about an hour. Enamel cups may have their uses, but drinking a hot beverage from one is not one of the uses. You may well need your first aid kit for your burned lips. Oh yeah, don’t forget about the two eight pound ice cubes in the trunk.
You don't actually see that addressed very often in these advice columns, but in winter conditions that gallon of water you're carrying becomes a block of ice and can rupture the container, which is a real problem if it then melts and floods your trunk. I speak from experience. Use good containers and allow for expansion.
I trust that you mean the old "Be Prepared" one, not the new "We're Here, We're Queer" one. < /sarc >