The Plainsman Motel, located in Blackwell, Oklahoma, was less than 20 miles from the Kansas border. According to this tourist postcard, the Plainsman, with its Googie architecture front office, had a restaurant and service station facilities.
Presumably, the Plainsman has been demolished; A quick net search (hotel web sites and Google street view) shows no lodgings resembling this.
Postcard from my personal collection.
I was there as a kid!