Earlier this year I sailed along the South Coast of the Kangaroo Island as part of a circumnavigation
of the island.
Vivonne Bay is noteworthy as it is most protected anchorage on the South Coast, providing shelter from all directions but E or SE winds. It might even be possible to ride out a SE by tucking in very close between the jetty and Point Ellen. See attached map.
That said, pick your weather
window carefully if you plan to sail the South Coast. There is nothing between you and Antarctica!