This might allow a little more freeway driving. We travel Texas 19 south from I-30 at Sulphur Springs to Athens. Texas 31 from Athens to Corsicana to I-45. You then could exit I-45 at Buffalo on US 79 and finish your route as planned. The road is good except for about a 10 mile section just before Corsicana, not many stop lights.
There is a great place to eat buffet in Fairfield call Sam's Restaurant, lots of parking for trucks and RV's.
Charlie
2001 F-250 Lariat SC 4x2 LB 7.3L PSD
BD Power ECM 80 HP Performance Chip
BD Power X-Monitor LED Digital Gauges
Firestone Ride-Rite Air Bags
2005 3295RK