One of Elvis' biggest songs was Polk Salad Annie, but do you remember who wrote the song and had the first hit recording of it? I didn't think so. It was Tony Joe White, who also could have passed for Elvis brother back in the day.
This made me think of a yet to be fully developed genre of music I like to call Swamp Rock. Other Swamp Rock songs would be Amos Moses by Jerry Reed:
And of course there's a couple of well known Swamp Rockers by Creedence Clearwater Revival (still one of my favorite names for a band) like Green River and Born On The Bayou:
And one of my favorite guitar pickers, Roy Buchanan, had a great Swampy version of Haunted House:
Can you hear the funky Cajun string that ties all these songs together? These songs were born of the Swamp I tell ya.