AB what are you actually patrolling? If it's an airfield I would imagine that it's just the ability to drive slowly in low gear around the perimeter with the occasional dash to catch offending pilots who aren't wearing their hi-viz vests
As
Hersham Boy said, driving a tractor is no different from driving a car except slower. Be prepared for one with a hand throttle, clutch on the right pedal and brakes on the left pedal though. Once you get over the unfamiliar controls it's a doddle as everything happens relatively slowly.
Edited cos I'd got my pedals the wrong way around......