You're not going to have any problems following the Kepler Track; it's a well-signed motorway, as are most of New Zealand's Great Walks. The track starts and ends at the control gates at the southern end of Lake Te Anau, heading anti-clockwise in a large loop. The following itinerary is the one that most people follow:
|1||Control Gates to Luxmore Hut||14.1|
|2||Luxmore Hut to Iris Burn Hut||18.6|
|3||Iris Burn Hut to Moturau Hut||17.2|
|4||Moturau Hut to Control Gates||17.1|
As this is a Great Walk you need to book your hut accommodation in advance. You can do this at the DOC office in Te Anau, but at peak times you should book well in advance. The Kepler Track is a very popular walk.