Let me get this straight. So you run the world's most sophisticated terrorist org. You have veto-level influence on the country and government, meaning you can even get legal edicts signed to move the materials, if you wanted, let alone doing so clandestinely. You have an enemy with air supremacy over your territory and precision strike capabilities. And you, considering this a useful stash that you wouldn't want to lose to something like an airstrike or an accident, make the decision to keep it all in one place at an above ground port storage facility?
Sounds less like speculation, and more like nonsense.