WEBSITE This 164-acre park is situated on the Bledsoe Creek embayment of the U.S. Corps of Engineers Old Hickory Resevoir near the old 1780's settlement of Cairo in Sumner County. Limited tent sites, NO RV's. Show up early, no reservations are taken here and it's just under $20. Hot showers. About 20 picnic tables and two large shelter areas available for day use picnic.