Nah man, you don鈥檛 own your plot. You can鈥檛 tape an area off. If someone else needs the spot they鈥檙e well within their rights to take it. You鈥檙e the one in the wrong here. If you all want to camp together side by side then either arrive together at the same time or take your friends tents and pitch them too.
Have you not read about wood burners? Google it. People are seriously starting to take issue with wood smoke. Apparently it causes harmful particles etc.