Most times, you receive each load of an ingredient from a new truck driver. They won't know your operation, and they may be unaccustomed to hauling feeds. Provide a good drive-through to your commodity barn. Truck drivers spend most of their time driving forward on pavement. Backing between buildings on loose gravel, so soil, or mud will disappoint you and the driver.
Deliveries can happen anytime.
Always have the driver call ahead to give you the expected arrival time and to receive directions. When you order feeds, clearly explain days or hours unacceptable for deliveries. You'll still get a load or two when you don't want it. Locate truck scales near your farm - you may need to use them. Several farmers reported loads arriving with no weigh slip available.