Hi Don; You're right,, it is hard to find an empty barn. Thanks for looking into doing aa tour.
As a carpenter who likes old buildings I would like to point out that many old buildings are better built than modern buildings.Just because it is old does not mean it is "structurally compromised". Also, bouncy does not mean weak. You are correct to be cautious going into rarely used barns. I often start at the basement and work my way up so I can see the condition of the floors before walking on them.
Thanks again; Jim
The closer you look the more you see. "Heavy timber framing is not a lost art" Fred Hodgson, 1909