Security through obscurity still does not work in the long term. The hope with this camouflage is that the attackers won't notice you. That does not exactly work in reality. Granted there are higher value targets, and some lower value targets for the attackers. There is the case however where you are noticed by the attackers. It could be by accident, they saw one of your trucks, or this is a disgruntled ex-employee or customer.
It is always better to have a security plan in place. You never know when the business will be targeted. Although hindsight is 20/20, the foresight is not.
