If you go to Jervis Bay, Kangaroo Valley and Ulladulla are just day trips from there. The camp ground at Jervis Bay is good but expensive, particularly at Easter (it may also be booked out at this stage.) This Map is centred on Huskisson - click on the pins for more information.
For Narooma/Merimbula area I can recommend Wallaga Lake. There is a choice of 4 parks there. Map of area.
Nice area, we are just returning from there. We stayed in Ulladulla Holiday Village and Wallaga Lake Holiday Park plus Eden Gateway CP.
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PeterD Nissan Navara D23 diesel auto, Spaceland pop-top Retired radio and electronics technician. NSW Central Coast.
Be warned that all these areas will be very busy on the Easter Holidays. If you free-camp, you'll have to get there early before Easter for a spot, if you want a caravan park, phone first. Sites are often booked months ahead for high seasons like Christmas and Easter.