For your next trip:

I've never been there, but there's a Jimmie Rodgers museum in Meridian Mississippi. (My father used to listen to Jimmie Rodgers on the radio PRE-Grand Ol' Opry.)

Lots of musical heritage in Macon GA, but is anything more important than the Little Richard House? https://www.maconmusictrail.com/little-richards-childhood-home/

FWIW, Tommy Roe's backup band The Roemans used to play in my hometown when I was growing up. Apparently they toured Britain with Roe in 1965.