Coffin Bay is on the West coast of the Eyere Peninsula, 30km NW of Port Lincoln. Tumby Bay, one of my favourite camping places, is on the opposite side, the East Coast of the Peninsula, and 50km NE of Port Lincoln. The Tumby Bay Caravan Park is right on the beach of the Spencer Gulf.
Port Lincoln is famous for its tuna, which is mostly exported directly to Japan. They also catch huge lobsters here.