If your November freight is not on a warehouse appointment by the end of October, it sits.
Retail warehouses cut the doors they will work once the holiday freight stacks up. A truck without an appointment is a truck in the lot. You pay for that, or the carrier does, and then you argue.
Get the door number now
Call the receiver this week. Put the appointment number on the rate confirmation. If they will not give you a door, tell the shipper before you book the truck.
November is a bad time to discover that the building is full and the clerk who makes appointments is not taking calls.