Hey Oklahoma guys and gals! I'm possibly going to be running eastbound on I-40 with a final destination of Eureka Springs next month. It looks like my options at OKC are to catch the Turner Turnpike from OKC to Tulsa and then US 412 and the Cherokee Turnpike to the Arkansas line OR stay on I-40 through OKC and turn north somewhere around Sallisaw (US 59) picking up US 412 again at Siloam Springs. Will the turnpikes save me some time? By the time I get to OKC I will be a little over half way through a 600+ mile day. TIA for any input.