I don't like jumping to conclusions and possibly laying blame in the wrong direction, but ' caravan dwellers ' - not the holidaying kind - have proven another matter; before experience proved otherwise I might have even had a slight romantic sympathy !
At the airfield I worked on mainly, there is an ' official ' camp just outside, whose residents caused a great deal of trouble including use of attack dogs and shotguns.
A cleaner we had once was from a rival tribe; she remarked " you'll have to watch that lot, they'll be in to pinch all the lead off the aeroplanes " !