There was a book published several years ago about maple sugaring in Somerset county. It talks all about the history of making syrup way back into the mid and late 1800's. There are a lot of old photos even of Wagners sugar camp. The book also talks about some of the terminology used such as keelers and spiles.
As far as Wagners Sugar camp goes, it was always a family run operation run by Sue that was on the show and her brother Dale who passed away several years ago. When he died, that Jerry went to work there and thats why he's only been there 5 years.