>>1758464if you can spare the time to go to the ardennes or Eifel in Belgium or even Germany (it's pretty easy if you have a car, a bit harder if you rely on public transports) those spots are pretty, and you can go a dozen kilometers without seeing other people if you go during the off season (september to around april/may depending on the weather). I've camped plenty of times in those areas. Also if you keep a low profile and look like you know how to handle yourself the forest rangers are pretty nice, and will let you be, even though camping is technically illegal in those places (by this I mean Belgium, I've never been checked the two times I camped German Eifel).
Moreover, those areas have many "bivak" zones where camping and lighting fires is permitted, so my trick (particularly in the summer when many kids and families are /out/ there) was to camp not too far from those, so everyone just assumes I'm headed to one of those with my rucksack, and any smoke/light/smell my camp produces can look like it comes from a bivy zone if seen from afar. There are quite a a few more than those registered on the forest ministry's website, as the actual organizations the forester guards work for are separate. The best way to find them is to go to one of the "official" bivak zones and look on the maps/panels provided there.
These smaller bivak places are nice because tourists, scouts, french people, and other normies generally don't know about them and they're left alone. Only had to share one of these 3 out of maybe 15-20 times I camped on one.