If you’re going to Manapouri, treat it as a small lakeside gateway to Doubtful Sound rather than a town with lots of services. Book Doubtful Sound or West Arm cruises ahead of time and expect early pickups and a boat-plus-bus transfer; tours run in all weather so bring warm, waterproof layers, a good camera, and sturdy shoes. Shops, cafes and fuel are limited, so top up supplies and petrol in Te Anau or Queenstown before you arrive, and don’t rely on consistent cell coverage. You can also kayak on the calm lake, try fishing, do short walks, or join a guided power station tour if you want an indoor option.