McGlashan Challenge One Day Kepler Run

I plan to run/walk the Kepler track in one day with my father. It is a 60.1km loop located in the Fiordland National Park. I estimate that it will take 10 - 14 hours. We will drive up to Te Anau on Saturday, the 19th of December, and commence the walk around 5 am on Friday, the 20th, aiming to finish by 5 pm. We will be walking around the loop starting at the Kepler Track shelter and car park, then go to Brod Bay shelter and campsite (5.6km), to Luxmore hut (8.2km), third Iris Burn hut and campsite (14.6km), to Motarua hut (16.2km), then Rainbow Reach shelter and car park (6km), Lastly back to the Kepler Track shelter and car park for the entire loop(9.5km).