In 40 plus years of camping, never had anything come up missing. However,it depends on where we are camping, as to how much gets put up or otherwise secured. I almost always chain the bikes, I don't leave a lot out however. Partly not to tempt somebody, but also, one of my early camping trips (tent days), unexpected storm came up. When we got back to camp,our stuff was scattered all over the place. So, when leaving the site for awhile or retiring for the night, I try to secure things in the event of weather related events, which tends to make some of the outside stuff less visible. But, I lot of that depends on the area we are camped and weather forecast predictions.