I drive through OK regularly as I am moving from Colorado to Memphis. My normal route takes me down I35 from Kanasas, Tulsa Turnpike, then I40 to Arkansas.
I usually fuel up at the Kanza Travel Plaza, OK exit 231 off I35. Cheap fuel. and almost exactly the mid-point on the trip. I'm normally there around 2am Saturdays, but this week I'll probably leave TN on Saturday morning instead of Friday afternoon - so I should be at the fuel stop early Saturday evening.
Garnet '99 quadcab sb 4x4 with TDR sticker in the back window, pulling 18' car trailer with 3 huge shipping crates on it. CB 19