The Fiordland National Park is the "Walking Capital of the World".  There are so many walks to choose from including short walks on the Kepler Track which start less than a kilometre from Dock Bay Lodge.  A great option also is to helicopter from the front lawn to the top of Mt Luxmore on the Kepler Track and walk back home again.  This would take approx. 4 hours (quicker or slower if you choose) and gives you the experience of a flight plus the amazing scenery from the track.