Schäferhaus Campsite at the Ochsenweg Sculpture

Wild camping is generally not permitted in Germany.
For everyone who treats nature appropriately and wants a place to camp in nature:
Wild Schleswig-Holstein is an initiative that offers such places.
Here for example :) See picture

This overnight accommodation is offered by the Schleswig-Holstein Nature Conservation Foundation. The site is located in the heart of the Schäferhaus Foundation's land (Schleswig-Flensburg district), a former military training area. At this overnight accommodation, you can pitch your tent near the sculpture next to the famous "Ochsenweg," a historic country road.The overnight accommodation is unmissable thanks to the wooden sculpture depicting two symbolic ox horns. A sign with the "Wild Schleswig-Holstein" logo makes it easy to find the overnight accommodation. Advance reservation for camping on the Schäferhaus Foundation's land is not necessary.

Beautiful little trekking site "Schäferhaus" with space for two tents as part of "Wild Schleswig Holstein": stiftungsland.de/touren-und-termine/entdecken/trekkingplaetze