Camping on the foreshore at Rye Vic.
There are a couple of "parks" on the foreshore that are open from Nov to April only.
The rest of the year, they are public land use for picnics, markets etc. Cheap, scant amenities, some powered & watered. These are very busy over the summer break.
You can book in well ahead for the whole 6 months. Just fantastic summer fun if you don't mind the summer heat. love to stay in the mountains or an airconditioned home in the heat of summer though the beach is wonderful once the heat of the day is over and in the 'off season.' Children do not tend to be as fussy as me, lol, and I've never met a child who has not loved a holiday by the sea.