The yowie-mobile bumps over a teeth-gnashing grid and along the winding driveway of Richlands, a sprawling private property on the outskirts of Taralga, about 50 kilometres north of Goulburn.
Suckering elms, laurels and hawthorns more than a century old line each side, their low-hanging branches creating a dark tunnel through a dense understory of ivy and periwinkle. It might be midday but I've had to turn my headlights on to see the way ahead.