Yeah, but they'd have had to have a boost, and they had people in there that they didn't want to wake up. There were signs of forced entry on two of the locations and at KR's the lock was not locked on his trailer door so he'd gone to bed feeling comfortable that he didn't need to lock up that night, for some reason. So it was two of the other three that had signs of forced entry.
Edit: DS noted the door was unlocked but did not mention that there was any signs of forced entry.
It was a padlock outside the camper that DS noticed was not locked. That was used when KR was not there.