We called, and a friendly man came to the campsite. We were able to use the shuttle service. It cost €45 in total. We used it for an overnight stay, and I wouldn't recommend staying there for longer. The site is very small, and the ground is sandy, which (now in autumn) gets dirty in the morning, so you'll have to take your camper with you. The sanitary facilities are far below par: one toilet and one shower (which you have to pay for separately).