If you don't have your gun for 'roo hunting, a farm truck works pretty good too. I took a trip down to Australia in high school and stayed on a ranch in the outback for a weekend. We rolled in at 10:00 at night and this 65 year old rancher tells us to jump on the back of his flatbed and to hold on. He then tore ass around 5,000 acres trying to drive the kangaroos off his land before they ate all his feed. Some of them were able to jump the fence, others were not so lucky.
The next day he took us on a tour of his Wild Boar traps. Basically he took big sheets of industrial chainlink fence and wrapped them in a circle with the sharp ends pointing to the inside of the circle. He would load em with bait, the boars would charge the fence, go through the part where the two ends meet and they would be trapped. If they tried to run out, they would skewer themselves on the ends of the fence. He said he tried to hunt them before, but was getting slow in his age. He didn't think he could dodge them if he missed and they charged at him.
I found it ironic that his wife stayed at home and nursed the orphaned Joeys whose parents her husband just mashed. Thought you all might find that amusing.