Anyone of a certain vintage will probably remember this little ditty: Born on a mountaintop in Tennessee, Greenest state in the land of the free, Raised in the woods so he knew ev’ry tree. Kilt him a b’ar when he was only three. Davy, Davy Crockett, king of the wild frontier! That, of course, is the first verse of “The Ballad of Davy Crockett,” which introduced a television series aired in 1…