Coffs Harbour to Sydney Town and somewhere in between.

I am looking for somewhere quiet near the beach that I can set up my camping trailer for the handbrake and 4 young tin lids. I don't want to hustle and bustle of a caravan park in the middle of a town unless it is quiet and near the beach.
Given my co-travellers, three being female, I need some conveniences be they basic to make life a bit easier.
I am wanting to stay in the one location for about 7 days so as to unwind.
It needs to have plenty of things close by to keep all entertained, be it bush lands, walks, more beach, a fish and chip shop.
Something similar to Bounda National Park would be great (without the f'ing possums) but north of Sydney but south of Coffs.
I have posted this tread on other forums so as to cast the net far and wide.
Hopefully someone out there has the local or experienced knowledge I need.
Regards,
Paul