Mr. Mayor, for breakfast, I'd highly recommend Ed & Kay's Restaurant
in Benton, soutwest of Little Rock. Liketoeat and I have both mentioned this place on a few other threads. You'll love it.
I doubt that you'll be hungry when you get to Mt. Pleasant, TX, but if you are, there's a BBQ place I used to stop at called Blalock's
. Heading west, I think it'll be the 2nd Mt. Pleasant exit, and you'll take a right. It'll be right off I-30 behind a gas station.
Hopefully, some of the Dallasites can recommend stuff close to I-30/635 South/I-20 West/I-35E South in the Dallas area. I haven't found a lot of good "Roadfood" places close to the highway, but there's probably a bunch I've overlooked.
I'm sure you'll be stopping in West, but just north of there at Abbott (birthplace of Willie Nelson), there's a place called Turkey Shop
that fixes a GREAT turkey sandwich (McDuff might be ready for a snack
Little Rock to Round Rock is approximately 8 hours.