We've done the Concord, NC-SW Louisana, Concord, NC route 6 times in the past few years.
www.gasbuddy.com is your friend. Avoid buying gas in Alabama if you can except around Montgomery.
I can hook you up with some sinker cypress in Henderson, LA if you're interested. Beautiful stuff and worth the price. If you have to ask....~$30/bf
A couple of road food places on that part of your route worth checking out:
Rayne, LA-Frogleg capital of the world...kinda like chicken
Scott, LA on the I-10 frontage road-Don's Specialty Meats has the best smoked porkchop sandwich in the Universe. Just a big chop, 2 pieces of white bread and Cajun Power Garlic hot sauce. Try the Boudin (
boo-dan) if they're out of porkchops. Don't worry about what part of the pig they put in there.
Mobile and Montgomery, AL- Dreamland Barbeque: Stop even if it's not time to eat. Get a chopped sammich and a slab of ribs to go. "Ain't nothing like 'em nowhere." (Before anyone has a seizure, I'm ecumenical when it comes to Que...good pig is good pig!)
Spartanburg, SC- Wade's off old I-85, right on 185 for 2 miles on left. Awesome vegetables. Do the buffet on the left as you walk in.
If you have an extra hour get off I-10 at Gulfport and take 90 east through Biloxi, over the new bridge and along the Gulf through Pascagoula. It'll humble you. I'm still amazed more people didn't die.
We have found the fastest way is up I-85 through downtown Atlanta instead of taking I-59/I-20 through Birmingham to Atlanta. Use the HOV lane if you can in Atlanta and you can scoot. Also...watch your speed as you enter SC from GA. The Speed limit drops to 65 and they watch the first few miles close as you head north.
Have a great trip!