Additional note #2:

I am pushed into a bank waiting to lock, from my perch, I see the following:

Legal to pick up:
1) Cut pieces of lumber from a collapsed barn (enough to build a very nice, roomy shelter)
2) Electrical wiring (to lash a shelter together)
3) An abandoned refrigerator (instant comfortable latrine)
4) An undetermined length of 3" line
5) Grove of young trees (good for making a puptent style, wickiup, or lean to shelters)
6) Plenty of ground insulating material

Illegal to take/use: nothing to list.