On our way home last week, had to make a quick change in plans due to a storm which flooded the park we had a reservations for in southern OK. Called Twin Fountains in OKC, which is the site of the fall rally, and they had a slot for the night.
Nice park. Lots of new sites being added at each end. Lots of space between sites with trees and grass. No cable or picnic tables but that is about all it is lacking. New sites are currently gravel but I am assuming they will be concrete ultimately. The powers that be done good.