Jim Connor wrote the lyrics and tune for Grandma's Featherbed. John Denver's recording was the one most people heard.

My two cents regarding the terms "folk" and "tradional" as they relate to music: it is the realm of academics to devise useful categories which help in the historic and technical placement of songs or tunes. Music of unknown origins that has passed through several generations is placed in one category. Music of known origins that has passed through several generations and possibly even gone through some changes is placed in another category. New music, though it has appearances of older music, is in yet another category. In some contexts music from each category may be placed together in even another grouping. Categories are academic devices to describe something about the characteristics of a particular song or body of music. It seems to be the nature of the human race to continuously challenge those decisions and debate the nature of the criteria.