True - they could seek a TMP for alternate courses, however. KOCC did have a TMP for Steel River for a couple of events, and HDCC has TMPs for Steel River, Blackhill and (as I understand it) Seaham.
BTW, I ran in to the guy from Port Corp who manages the KI site when I was out buying my lunch today (he is a mate of mine), and thanked him for the new surface!