Permanent camping Clearing of a parcel?

Hello, I turn here to the permanent campers or lawyers among you;I also know that this topic does not necessarily belong here,but someone knows what to do with it… So I’m interested in what it looks like purely legally, if someone has leased a permanent campsite, camp there for years to all satisfaction.Now the case comes up that this good man gets problems with the enjoyment of alcohol, his lease no longer pays and also his place or the caravan unwarranted It does not respond to several reminders from the site manager.Logically, the announcement follows, but he also ignores. Now to the actual question,the site manager should now join in to let the space be cleared by his own hands,to scrap the WoWa and the awning and inventory? The whole thing has played off on our place last year and this topic provided a lot of talk material among us at the WE-vieleicht someone knows a similar case or knows how d he situation here looks legal for both sides?