One of the things I did glean from Google about the local area was that in the early 1990's Gillan Creek, situated immediately below our cottage, became notorious for large-scale commercial bait digging.
Five minutes later I had a knock and then a pull down on the lugworm and picked up the rod to feel a fish on the end. As it came closer the gold bar that I had hoped for turned to silver as a small schoolie bass appeared on the surface. Popped him back and re-baited with the last couple of lug. Gave it another half an hour into full darkness, but wasn't troubled again, so packed up and made my way carefully over the rocks and back to the house.