Jack, I think thats really cool that you know the places where they worked, and that you now know where the Yankee workshop is. I thought I read at one time that it was actually a barn/shop at the producer Russ Morash's? house.
Sorry to highjack,
I have met Roy Underhill (one time spent a few hours partaking and enjoying a fat cigar with him) on a few occasions. He comes off on his show as somewhat of a scatterbrain, he uses all hand tools and his work sometimes seems rather crude. In reality he is highly intelligent, and highly educated. Funnier than a dozen comedians put together yet very down to earth. Very much a craftsman in the woodworking trade as well.