No, I don't. Maybe look on the wiki camps app.

What about the Yarra Valley? I know it's not beach but it's close enough to Melbourne to go up for a weekend. Plenty to see and do. I know some really good camping spots there.
I think they are set on Johanna bay for last week-ish as is the long weekend so the distance doesn't matter so much. Prior to that they may well like the idea of Yarra Valley - and I agree loads to do there - which campsites in particular would you recommend?