This place is a mix where you can find the dunes, the river and the ocean at the same place, and you still have a good restaurant with many funny out door activities, just depends on you intend to pay.
Altough the place is very beautiful, it's not one of the best Natal places. There is only one restaurant and it's very expensive. The quad trip is a good option, however it's also quite expensive. It's more like a river so you don't see a lot of people swimming on it.
We went there just to see and take some pictures so I cannot help with any price or activity they provide there. I know it's paid to enter because it's like a farm so if you want to go inside just to take picture it's good to negotiate in the entrance.