I've never seen the Mississippi, but I read the Mark Twain books years ago. There's nothing that big over here, but over in continental Europe they have some epic rivers. I'm not sure any have had as many songs written about them.
I've seen people like Bob Dylan play guitar like Cash, but I don't. My acoustic is a fairly big, so it would be a stretch.
Tina Turner put on a great show back then. I never saw here live.