Short Cut-
Here is a site that may help you identify your rig.
http://www.vintageairstream.com/archives/index.html

We are on the hunt for a vintage shortie or mini as well. We want something small to boondock in bike ride parking lots. Our 28 footer is a bit long.
We want a 16-19' Airstream or a 16' Canned Ham.

Here is the place you need to go for restoration info:
http://www.airforums.com/forums/
I am Bird's Nest on this forum.

You can also find brochures for most vintage AS's at the factory website.
http://www.airstream.com/index.html

I love your story. We are riding down country roads every chance we get scanning back yards.
I'd love to see pics. I could help you identify what your treasure is called.