There is plenty of parking space near the beach, boulevards and shopping areas. From Monday to Saturday there is paid parking in downtown Vlissingen. From April to October, paid parking also applies on Sundays in many places around the boulevards.
Are there free public parking spaces for campers (also called recreational vehicle park or caravan park) in Vlissingen where overnight stays are allowed?
There are no (free) public parking in Vlissingen where you can stay overnight.
You can only overnight with your campervan at one of the local campgrounds.