A holiday and camping site called Schuldt.
We spent the weekend on a field without electricity or water. It only cost us 12€ per day, which is a great deal. There was no specific time limit for when we had to leave, so we peacefully packed up on Sunday afternoon and headed home around 2 PM. We will definitely visit again.
We spent a night on the campsite field, which was okay for us at a rate of 15 euros per night. The beach was not far away. The sanitary facilities were decent, but we would have preferred them to be cleaner. Despite still being in peak season, one of the shower doors was broken and there was only one shower for the entire campsite. Upon further reflection, the price of 15 euros seemed quite steep.