I would run 98/19 up to I10 west to 231 north to Montgomery, Al. Take I85 west to I65 north up to Indianapolis. Then take 465 North to exit 33 to Keystone parkway towards Carmel.(US31N) to US20E. Go east on US 20 to SR19 N. This will get you near Elkhart, you will need to where your campground is from here. It might be a few miles longer, but this is the way I would go. Montgomery is not bad, nor is Birmingham(as long as you are not in rush hour). Nashville can be touchy, but better than Atlanta. Louisville is not a problem(Again as long as not in rush hour). Same for Indianapolis. I have been through all these towns, with little problem. Like i said Nashville sometimes gets a little hectic, even in non rush hour times, but if you get through there between 10 and 2 you should be ok. This spring we stopped at Deer Run RV park, which is just north of Troy, Al off Rt 231, About 370 miles from Brooksville, Fl.It is approx. 425 miles from Troy to Cave city. We also have stayed at Cave Country RV Campgrounds Exit 53 I65 North of Bowling Green ky. It is approx. 355miles from Cave City to ElkhartYou can check out Woodall's .com for directions to these campgrounds, easy on and off. If you have any questions just ask, or PM me if you don't want the info on here.
03 Silverado cclb 3500 drw, D/A, Reese 22k hitch
07 Alfa SeeYa Gold 30RL,2 slides,power everything