This will only work if they have a terminal in your area. You can click on Locations to see where the terminals are.
Your Dealer Number will be on you purchase order. The VIN will not show up on the website until it's being turned over to them for shipping. Mine showed 3 days before it was actually delivered.
You can also click on Delivery Receipts and play with the calendar to see if there were deliveries from them to your dealership in the past. That should give you an idea of whether they will be hauling yours. The Delivery Receipts show all Subaru's on the truck along with the VIN number of each vehicle. Good Luck to you~