Wondering where your RV will be while you are away? If you are at a campground, when my wife and I have went on side trips for a couple of days, we let the front office of the campground know we will be away for that time.
If you are boondocking then you are more vulnerable for something to happen. If you have made friends with someone you think you can trust, ask them to keep an eye out for you. Other wise a camera system that is hidden along with an alarm system that would go off if someone gets inside (motion detector) is about all you can do.
We take cameras, money, senstive papers and anything of real value if it will fit into the car with us.