I highly recommend Speedway Sportspark. Stayed with them 2 times. Most recently last July.Great people.
Reserved gravel spots. No hookups. You can see the track and walk to it.
They have free hot showers (not fancy). Last year every morning we had a newspaper delivered to our site. They had coffee going all the time. Saturday night they had a live band. After the race free hot dogs. Pump out service, ice delivery. The owners are Very customer orientated.
http://speedwaysportspark.com/
Camped in a Winniebago 35' motorhome.