I was lucky enough to do the ultimate experience a year or two ago, it was the single seater, a wee bit of skid pan, then the rally stage at the end. it was a great day and i'd love to do all of them again.
The single seater, driving around on your own is great, i would definatley recomend it. For anyone that has been a fan of the track for a long time then its a real treat to drive the actually drive the circuit.