From 1.5.2009. a new Law on Amendments to the Law on Catering Activities was introduced in Croatia.
According to the law – camping, parking, overnight camp outside the camp is a penalty, punishable by a fine. If the car is parked unauthorized, etc. it can be sealed for a period of 60 days.
Self-unsealing is punishable. The lessee explicitly agrees that he/she will not violate this law. If there is a breach of the law, the lessee will bear all the costs associated with camping caretaking.

HERE you can find out more about camping in Croatia