If I was a not-too-bright thief or one of a couple of kids horsing around, I'd seek out a place like Walmart that has multiple entries and exits, is open 24/7, and has people coming and going at all hours. Nobody would notice me while I was shopping in the parking lot. I say not-too-bright because they probably don't know what its for but its easy to steal.
OTOH, an RV park normally has a single entrance/exit, maybe a key card or code to open the gate or an office within sight of the gate that may or may not have someone manning it inside. But you have to pay for security. I've always thought it was worth it.
