Tracknet bus during the tramping season, they make 4 trips a day between 8:30 am and 2:40 pm. If you have a fishing licence take your rod and have a fish in the upper Waiau.
While you are there, I would recommend the easy forest walk along the lake to Brod Bay, 5km each way. This photo was made on an ordinary day in April 2014.
Explore with the Milford Sound Guide