If I were east bound from DFW, I would take HWY 19 exit at Canton.Take HWY 19 North to HWY 80. Stay on HWY 80 to Gladewater, then get back on I-20. Or just take the HWY 80 exit to Terrell.
State Hwy 14 between 80 (Hawkins) and 20 (Tyler State Park) is only 14 miles and a real pretty drive. But stay away from the Bodacious BBQ at 20 and 14. Used to be great but it changed hands and it sucks now.