I don't know how many hold-down locations a standard car trailer has, and if they can increase the number. Maybe all it takes is more lashing gear.
Another thing that has been in the back of my mind, and in consideration of specific vehicles going to specific dealers (rather than just a slug of lot stock), is the possiblity of all smarts going to Michigan to a smart controlled marshalling and distribution center, where they can be forwarded to the proper dealer. Somewhere in the dark of time I recall a statement that all smarts would be initially titled in Michigan.