How about the waste deposit?
With purchasing a camping ticket you paid a garbage deposit 20,00 € and you will get a rubbish bag. In this bag, you need to store the incurring trash.
When you are departing, the campsite has to be cleaned (will be controlled) and the bag returned. Then the deposit will be refunded.
When you are departing, the campsite has to be cleaned (will be controlled) and the bag returned. Then the deposit will be refunded.