"Wagoner's Lad" was collected by Cecil Sharp, and published by Wyman and Brockway, 1916, "Lonesome Tunes," W. H. Gray & Co., NY.

Lyrics of "Wagoner's Lad" and other members of the "Old Smoky" complex are posted and discussed in thread 76295: Old Smoky
It is impossible to separate the songs.

Dorothy Scarborough collected and published eight North Carolina Appalachian variants of 'Wagoner's Lad' in "A Songcatcher in the Southern Mountains," 1930; the more complete are posted in the thread linked above.

The Traditional Ballad Index, copied in the linked thread, lists recordings, including the first by George Reneau, 1926.