While living in Los Angeles Harland Howard was once signed to a song publishing company owned by Tex Ritter and Johnny Bond. It was he who wrote "Everglades".
The Kingston Trio "Everglades" comes from the 1960 album "String Along", their fifth consecutive studio album to hit number one! Listen near the end of the tune for the reference to Don and Phil.

Why is the Everly Brothers hit "Bird Dog" (Boudleaux Bryant) here? Just listen to the opening guitar riff from 1958. It should sound very familiar.