FastGuns / Hallmark - how to provide extra camper security?

Have never had an issue with security. We have the original pins on the Fastguns, no locks, and have been all over the US with never an issue. I suppose if I abandoned the truck and camper for weeks and never came back to it someone might get curious about if it was available for "borrowing" but I can't imagine taking the camper off the truck - maybe steal the whole kit and caboodle but not just the camper. I'm probably too trusting but IMHO locks just keep honest people honest. Real crooks will do whatever they want.