Both woody and Damian SRT have been several times but unfortunately didnt respond to my pm's to give us the info. Its an approx 1600km round trip to a beautifull part of the GDR not far from the Rheine Valley, an area I know quite well. On top of that there are hotel costs, ferry cost and entrance to events so all in all i'd say approx 500.00. You can drive around the circuit and risk stuffing the car or pay to ride a circuit taxi. Once there there are some fanstastic areas to visit if you can spin it out to a week.