Are motor caravans and campers allowed at all campsite pitches?
No, camper vans are only permitted in specially designated places across the park. In the campsite description, you can always read for which camping equipment the campsite is suitable for.
There are special campervan parking spaces at Marinapark Volendam and Roompot Beach Resort. You can stay here overnight, or just stay during the day (for a fee). Reservations of this site is not possible.