The Cookson Hills area is indeed south of Kansas OK. There is a Cookson Hills Cnristian Ministries center about 5 miles south of Kansas OK.
Be aware that there is a Cookson OK. It is farther couth in OK. I do not remember what county, but Sequoyah County pops into my mind. Could be Haskell County. I'll check and let you know later.
So there is a town of Cookson and there is a Cookson Hills area. Can get confusing.
Mahlon Erickson
Stillwater Ok