This is one of the reasons I am a big advocate for simple storage solutions like mounted drawer systems and bringing the concept of "5S" from Japanese management, or "Mise en place" from French kitchens into Overlanding. Most folks recognize these as things that make life around camp easier, but they are instrumental to security.
If everything has a place that is intuitive, easy to access, and handy -- and more importantly, if the user trains him or herself to put things back when it's done - your Rig is sort of always 'put away'. That's obviously not a solution for some stuff like chairs, but those are also fairly easy to replace. When done right, using lockable organization, your rig is always "secure" so leaving for a day hike requires little extra prep. Locks, as others have mentioned, keep honest people honest. They won't stop a determined thief. That is what insurance is for.
Generally speaking the closer you are to population, the higher the risk of theft. I feel more comfortable with fewer locks in the middle of nowhere than I do in high-traffic camp grounds.