There are a number of permanent caravan parks on the Central Coast NSW, but some I wouldn't recommend to my worst enemy. One that might be worth having a look at would be Mecca on Rutleys Rd Wyee it is owned by the same people that have the Big4 in Mannering Park. As far a I know it is all permanents or holiday permanents I have never heard of any major problems with this park and I live quite close by. It is at the southern end of Lake Macquarie and is situated on the shores of Macquarie Lake. I have no idea if they have any vacancies or what the rates are. This is their website http://www.meccavillage.com.au/
Cheers
David
-- Edited by Roving-Dutchy on Tuesday 3rd of February 2015 01:35:44 PM
Try contacting parks - there are a few coast that are willing to accommodate long-termers, within the constraints of the council rules. F'rinstance, you stay 5 weeks, go away for a couple of nights, and then come back. That way, the park is within the rules, and you have a permanent base.
Theres a lot of permanent/long termers at Sussex Inlet. Try googling for contact details.
Don't know if there are any vacancies, but I reckon its the best place in Australia!