Ohhh! Okay. You don't plan on leaving it in the boonies for extended periods. Good. FYI, cars get broken into at trail heads and the alarm doesn't help because there's no one around to hear it.
Most campgrounds and state parks are okay, especially in the day time. The exception might be if the campground were really close to a main road and a thief is tempted by the view, easy access, and few other campers around.
In some areas, I've seen ice chests stolen, if they were left out at night or when no one was around. In a number of parks, the rangers will confiscate any food or ice chests left out as it tempts our four-legged friends and well as the two legged 'critters'. Other than that, I don't know of any problems with theft when leaving something temporarily unattended in a campground.