Contrary to previous reviews, there are no costs associated with emptying the cassette and filling water if a minimum of 15 euros is spent on groceries in the intermarche. Just show your receipt at the gas station and you get the keys for free. Spending the night is also possible, but it is a bit noisy, but behind the Intermarche at the Continent supermarket there are 3 "official" camper spots where you are quieter. Outstanding service!