Flaggy Rock has a few cheap camp grounds this one is on the highway. We headed here to check it out and have some lunch.
The cafe has a gravel area that a few vans can park on. It's close to the cafe for food and drinks if you want any. There is a nice area by the water with some seating you can sit at with your own food.
You might like to check it out yourself as everyone has different opinions. We preferred to spend an extra $5 around the corner at the large, green, friendly Recreation Grounds. It has toilets, shower, pool and playground (See that post here)