If anyone wants a very cheap place to camp, I camped outside the Royal Oak pub last year:
http://www.touristnetuk.co.uk/northa...tone/index.asp
It was something silly like £5/tent/night and although not a fully fledged campsite, certainly adequate for a night or two. About 10 mins drive from the circuit.
Edit: I've also realised the wedding I have to attend is actually the previous Saturday, so a fulll LMS weekend could be back on the cards! That also confirms that more than one couple are getting married between us.