The area is access sensitive
The boulders at the farmground is not allowed to be climbed unless you have permission from the owner of the farm. Make sure to ask and then threat the area with respect. Same permission is required for parking and the entrance of the drive in to the farm.
The boulders at the hillside is access via the bridge which is located right at "Brostenen". There are small trails to most boulders and is most often the easiest approach. Parking is located at nearby farm. Be sure to ask permission for parking at the nearby residens.
Otherwise parking a bit limited and the parking marked when crossing the bridge or at the lake is the other solutions.