We've stayed at this KOA many times. The managers are very nice. One year, after our tent was blown down in a storm and everything was soaked, they let us stay in an unused mobile home on the property. They even offered us bedding and towels. You can't get much better customer service than that!
Elk Run RV Park welcomed us and our dogs at their facility when the KOA to the east wouldn't allow us to stay there because our dogs numbered more than 2. Elk Run RV Park is easily accessed from the freeway, close to a 24 hour gas/convenience store and is reasonably quiet. We'll definitely stay there again on our way through Oklahoma.