A bit tricky to find, but just keep driving when it gets really narrow. Mile, the owner, is a great guy but doesn't speak a word of English. Long live chat gpt. The facilities are very dated, but it works. And he does indeed take you to the Plitvice Lakes for 20 euros and picks you up again.

We booked this campsite in advance. Upon arrival, the person at the reception desk wasn't aware of the option to book in advance via the camper contact app. It turned out we were the first to arrive. And so it works now. A neat campsite with a climbing course and right next to the river.