Jas,
Its easy to find, come off the M1 at Junction 13, head towards Milton Keynes on A421 (or H8 Standing way as its called through here) out the otherside of MK, be aware theres a lot of roundabouts to go across, the last roundabout in MK is called "bottle dump" the next roundabout after this is the Whaddon turn, we will have Mud-Club signs out from here just follow them up to the farm.
If you have any problems give me a ring I've just Pm'ed my mobile number over.