We spent last week in Bateman's Bay - Left before the rain came.
Canberra will be one of your closest clubs. I know a few of the Canberra members travel up from South coast for some meetings but Canberra also zooms all meetings since Covid so we can log in and watch from anywhere.
Maybe keep an ear out for the Canberra club spring show at the start of October. Plenty of great bonsai on show for inspiration as well as a huge club sales table and several independent vendors selling stock including Shibui Bonsai and Bonsai World. Combine the trip with a visit to the Arboretum to see the national collection.
Bonsai by the Bay at Huskisson is probably your closest bonsai retailer. You will pay a bit more at a bonsai specialist but should usually get better stock than the commercial nurseries.