Cache is NOT at the posted coordinates. To find the final do a projection of 630.51 feet at a bearing of 272.75. There is safe parking at the cache site to pull off the highway.
Some more history about Ponca and this area.
Rock Cliff Ranch was built by Lew Wentz as the headquarters of his 2000 acre ranch and animal sanctuary. Lew Wentz never married. His residence was primarily a suite at the Arcade Hotel in Ponca City, OK, which he eventually owned, and he built a man-made lake known as Lake Supreme within his Rock Cliff Ranch strictly for his “houseboat” for entertaining.