Yeah an extra 5 - 10 per person isn't bad and if there's over 50 people there then it's hardly anything extra per person! It would be good for people in my situation where I was trying to give advice, and due to the nature of the venue it makes a great place for beginners due to masses of track time on the small donutty/circly area. Our sierra went through about 12 tyres or so, we were changing them round to negate the camber issues
they were mostly shit ones though - tyre pile 14s are always fricked as people who have 14s on their cars generally are poor and don't change tyres willy nilly.