Havan't got a Nissan Patrol,
but have a Mitsubishi Pajero which is fun to drive around fields in mud. Got a bit scared when the AI (inclinometer) reached 30 degrees though on a particularly steep bit of ground
Would love to help out, but am off for my "High altitude endoresment" and "Half pipe" ratings in the Alps this afternoon.
Ah, have just noticed that you said "airfields" and not "fields"...oh well