So basically the plan would seem to be to service New Orleans, Mobile, and the Mississippi coast with a relatively leisurely train trip as an alternative to driving or bus (given there is apparently no real air).
So it would seem. I did check just now and find no direct flights from New Orleans (MSY) to Mobile (MOB). The shortest flights (about four hours) appear to stop in either Houston or Atlanta. I have no idea what bus service there might be.