Here are simple versions of two popular folk songs from the 60's,
popularized by Creedence Clearwater Revival and Arlo Guthrie,
and later recorded by the great country star Willie Nelson.
Both songs are presented in the Key of C, and
therefore can be easily adapted into a two--song medley.
Sorry--- the lyrics are so small--- hope they are readable,
and if not--- they are easily available on the Internet.