Worth a try....I went in March and swung the Fisher from Eden to North of Batemans Bay (there's a lot of sand to cover) but found the parks and playgrounds far more profitable.
I had some luck at Broulee though with it being a shorter high rising beach head and very popular, around the flagged area.
I don't think there's too many coin shooters, I certainly found a lot of goldies pretty easy off the beaches, might have done better with more local knowledge, seems to me though the beach heads are very long and wide, a lot of walking between targets....perhaps I was too late with Summer giving to Autumn with someone already cleaning up.
I tried among others, Merimbula main and Short Point, Tathra main, up and down Dalmeny, Horse Head, Broulee, Moruya, Bermagui including the beginner beach for surfers on the north side, and Batemans & Batehaven at every beach head. I thought Dalmeny, Tathra, Merimbula & Bate haven would have been great but turned out to have very little under the coil including junk.
Batemans Bay, the main park in Tathra and Merimbula park were all good off the beach options, not amazing returns but worth a swing.
Try Doug for a bit of further info in that area, he might have some ideas.