It's not easy to book a venue as you're just a 'group of lads' and not a company. If you do twist Brunter's arm then you're looking at anything up to £1000 depending on the number of cars you want to take along, plus the cost of timing gear. There are also strict noise regs, (two strikes and you're out) plus a 'no dicking about rule' (one strike and you're out). Basically it's not the playground it once was, and I'd be surprised if they let you book the place.