Jonathon Boyd (from Brown Consulting) who the NCA have contracted to manage the course replacement indicates that:

Ian Dickinson has completed all that can be done whilst he is in Tasmania, aside from some minor maintenance on equipment and additional anchors to be made.
He has booked a crossing on the boat to Melbourne, which was the first available suitable to transport the goods, on the 30/10/11 and will also pick up the buoys on his way up to Canberra.
He will arrive on the 2/11/11 to commence the works. Works will progress quickly and pending no problems onsite, works will be complete by the 10/11/11.
Ian has informed me that the majority of these works will be conducted on the shore, and when work on the lake is required it can be easily planned in order to ensure zero disruption to the lake users, or impact on any planned events.