Nice man! Although you picked the redneck (and coldest!) part of Australia haha! Get a chance to check out the West?
We get stories on the news pretty regularly about farms being raided. It always seems to be asian run organisations that get in asian illegals, while in my experience white farmers prefer to hire backpackers or aussies. Generalization of course. Just gotta make it difficult enough it's less hassle to hire backpackers I guess.
http://www.abc.net.au/news/2016-08-24/illegal-workers-detained-on-woolgoolga-blueberry-farm/7782064
Our border force tv show is always 50% people getting turned back out of the country because they can't give valid reasons to be here/are here to work without the right visas.
The other 50% is chinese people bringing back in banned fruits/vegetables/meats 'but I don't speak english' facepalming bad