Have you decided on a route and turn point?
Down 58 to 71 to Cincinnati to 75 South would run you by me, and if allowed i'd run to the turnaround and back with you.
Down 77 to Columbia and26 to 95 would be a great route too, up and down lost of hills, likely less traffic until you hit Charlotte, then it'll be wall to wall all the way to Jacksonville and back.
Once you decide please advise, if i am going to ride along I need to finish up my aux tank so I can go another 150 miles too.