Hello foster034
Thanks for your post.
With Multi-Inventory you can create, "Inventory 1" to keep there the products for Truck 1, and another "Inventory 2" with items for Truck 2.
So, when a customer has placed the order, you can select from which inventory you want the products to be added, but, if needed, you always can set up the option to Auto-assign inventories to WC order.
You can see the documentation about how this premium add-on works by following this link.
Best regards,
Iryna