One of the simplest and cheapest things you can do to help protect your UAV investment is add a label with your name and phone number.  If it goes missing it is better to have the chance of it being returned then no chance at all.

This is also a good idea to do with all the gear you will be taking to the flying site – radios, batteries, etc.  That way if something gets left behind hopefully someone will track you down to return it.  It also helps keep your items straight when flying with others and sharing equipment.