I concur with Ross - this is a reference to MJH's 'Avalon Blues' which features the line, "Avalon my home town always on my mind" - you can hear the 1928 recording by following this link:
http://www.muzic.com/frames.php?target= ... sting/5063
Strange as it may sound, I've been there! Our dear friend Roby Duke who passed away last December is buried near Avalon, MS - as a kid, he used to sit and watch Mississippi John Hurt sing and play on the porch of the general store in Avalon. After Roby was laid to rest, I found the old (now dilapidated) Valley Store in Avalon - it is a small and very rural community about 12 miles NE of Greenwood.
Maybe we can change the lyric to "Avalon my gee-tar, always on my mind"!