Around here, especially in the southern part of AZ, and I suppose this could also happen in CA, NM, and TX, you may get "foot traffic" through your campsite at night. Yes, I'm talking about "unauthorized non-indigenous personnel". I know guys that have been camping during a hunting trip running into these folks. Usually, they are just passing by, but you never know what their state of mind may be, plus if they are with a coyote who may not want to be identified, you never know. Reason enough to carry while camping.
Correct me if I'm wrong, but the point of contention here seems to be the concealed carry. I thought in most states you can openly carry a sidearm? I know you can in AZ. I see it all the time.