We have spent a night here. It is a silent place. For 18 hours of parking we paid 10 PLN (2,5 EUR). The price is not related to visiting/not visiting Termal baths. All vehicles parking price is the same for 24h. The ground is uneven. From 10:00 it is getting a bit crouded, but parking place is so large, that even busses fits during the day.