There is ample parking around the castle walls. I parked the Volvo in between two other cars, despite the comment of my friend that the space was too tight. NOT! Which gave us both a laugh :-)
The secret is, a wise person once said: always park backwards, however small the space is to turn your car. Because you'll need more space if you park forward and then have to turn around to drive away.
It is great fun though, to see people run into trouble by not parking correctly. The manoeuvres!
This map is to give you an idea where Arnhem is located. It is in the eastern part of the country. The second red dot you see on the map is the town where I used to live: Oldenzaal