Mike,
While I am not a timber framer, I have documented many Dutch barns. All of the advice the framers are passing along are indeed the way to document the structure. I would also photograph every major joint in the structure so as to have a photographic record of the marriage marks.

You could also send along a couple of photos of some major joints to a couple of people who could then tell you if it is scribe or square rule constructed.

Just some extra thoughts to help add to your "small" pile of mail.