There are multiple Rederij Doeksen ferries a day, that will take you from harlingen to Vlieland in 45-105 minutes. Harlingen can be reached by car, train and for the ocassion also by bus from Utrecht and Amsterdam. You cannot take your car to the island as this is only permitted for locals.
You can bring your own tent or sleep on a real bed in one of the well equipped rental tents available at campsite Stortemelk. But of course hotels are also available in the village which is about 1.5 kilometres away. Please check the special offers at Stortemelk and at certain hotels!
Driving is no option, but there are busses and taxis. The most common way to get around however is by foot or bike. Bikes can be rented for a day or the whole weekend. Your JLV-passe-partou will give you discount on rental bikes!
The camping site is just meters away from the beach, so you can start the day with a dip in the North Sea. Furthermore Vlieland is a beautiful place for all kinds of activities like walking, biking, surfing, etc. There are also excursions to the uninhabited and completely sandy west side of the island - the 'Sahara of the North' - and to the sea where you might bump into some seals. There are also plenty of nice little restaurants and bars without getting annoyingly mass-touristic.
We certainly hope so!
Of course you can come earlier or stay longer. Discounts on accomodation might not be valid on these other days though.