All of our rack have rhino locks and the other racks have been augmented with log chains and heavy locks. When a piece of equipment is done, it goes back to the truck if possible. Other than that it is hidden inside some shrubbery.........underneath or somewhere compatible that the orange color isn't noticed readily. Just don't forget the equipment.
A few years ago, at a commercial newspaper office, we left a 10 ft. ladder behind a row of hollies. It was there all fall until we remembered where it was at.......the next time we serviced the site. It was still there!!!!!!!! On a sour note............we have had about 4 blowers stolen over the years. This was from employee neglect.