Interstates the whole way? Aw, shucks. Next time, consider heading across the Oklahoma Panhandle before cutting south. Boise City (pronounced Boys), Okla. is the westernmost town still in the Central time zone. And, do not go even a fraction of a mile per hour over the speed limits in Guymon, Okla. (voice of experience here).
On my trip around there in 2003, I was somewhat surprised that the northwestern portion of the Texas Panhandle was hilly. In non-winter, the entire TX Panhandle is exceptionally scenic.