Why don't you try Kiama? There are now 4.5 star new apartments available at Grand Mercure Kiama Blue. Wonderful views with an outdoor bar bistro overlooking the bay. (on internet) Go to Chachis restaurant great food, visit Shellharbour village lots of restaurants, nice ocean pool.
You must take the kids to Minnamurra 5kms north of Kiama beautiful clear river and you can swim across to a deserted beach. You can also go to Jamberoo Ski Park apparently they have new rides.
You most probably have already been to Kiama but if not it is worth a try.