There are multiple official camping grounds and caravan parks on the route. Unfortunately wild camping isn't allowed anywhere. I know that some people still try it, and probably so long as you're somewhere off trail, camp late and leave early nobody will bother you.
I dont live that far from luxembourg i'm planning to hike your trail.
i'm planning on doing it with a tent in my backpack. Did you came across some official campgrounds? Or is it legal to camp wild in luxembourg?
Thanks