According to the Forum article, "Police believe his actions were suspicious enough to warrant more investigation, but no link has been made to Bearsons homicide, ...."
Reading between the lines, I'm thinking that some suspicious "actions" occurred besides simply wandering. I'm not even sure if wandering around a RV sales lot at night is suspicious at all. For example, people go to car sales lots late at night all the time so they don't get hassled by sales people.
Something tells me this guy did something pretty odd or suspicious that isn't being revealed.
EDIT: Just noted that cops were sent at 6:30 PM. The RV place closes at 5 PM. The place is open on one side, right? As long as the lot is reasonably accessible, this could simply be a guy in the market for an RV that stopped by after work (again, unless he was doing something weird.)