Hill,
Great pictures, and I'm thinking that you are passing on an education that is just as good as any Tech School that he could attend. I can visualize young men like your son and Billy's being the Baird Hershey's of the next generation of ginseng growers and diggers. Right on, Brother.
I would say the roots I dig in PA are usually smaller sized roots, with lots of root hairs, and long skinny necks. They don't ever look like all the TN and KY roots that get posted in the forums here.