Having a car is a good idea. There is a motorway (A73)s nearby but with public transport may be a bit less than ideal.
Be there early in the mornoing, it gets busy, especially to park a car.
Eindhoven airport is probably best if you can get a flight to there. Amsterdam/Schiphol is a lot further away and I assume busyer (sp?).
Camping or hotel may be a option, or maybe a bed and breakfast?