Going on a national tour, give me your local eats.

I'm going to be on the road for 14 weeks starting in January. Basically I'll be goin around the perimeter of the country starting in LA and going counterclockwise before coming back home to northern California in mid-April.

What are the things locals would consider must-eats in the following spots:
Central Texas
Northern Florida
Atlanta
Philadelphia
"The northeast" (There will be time in New York and Boston but I don't know how long and I already have some places in mind for New York)
Indianapolis
Utah

There are other spots but I know where I want to eat in the Minnesota/Wisconsin area for example. My mom lives outside Phoenix and they have a Culver's there and if it's that good in Arizona I can only imagine how much better it'll be in its homeland.

NO SHIT FOOD FOR JOKES. It's cute to tell Nick and Mitch to go to Taco John's but I'm going to be driving a small van on my own and don't have time for misery!

So far I think I need to hit up Wawa, Waffle House, and Zaxby's, but I need to know if there are other regional chains outside of California I should try. Thanks!