I was invited to a private track rental and there may be room for a few other cars, not sure if I am going yet. Any experienced trackers that want to go to Roebling in Aug let me know and I will put you in contact with the people that are renting the track. There are no run groups and track time is as much as you want to run all day, should be about $200. This is not for beginners but if you have tracked and are not familiar with RR I am sure one of the guys will take you out for a run.