Loved Anna's River Hut. Compact but well designed, congrats to the architect. Being 70, and not wanting to climb the ladder at night, I opted for the mattress added to the pull out couch on main level. There was still a lot of livable floor space for my wife and me. The space is very modern and even has a pull out drawer electric dishwasher. How cool.
Arrowtown is the new in thing in Queenstown area. Should have bought a house 3 years ago. The cutest town center and the main street (Buckingham St.) is only two blocks from the River Hut. Or as Anna said, walk the Arrow River trail (1/2 block across the street) to mid town.
One last tip, Queenstowners love driving here for dinner (20 min.) Two of the hottest restaurants in Arrowtown are Saffron and La Rumbla, book your dinner reserves online a few days before your arrival or you won't get in.
Summing it all up, we loved our stay and hope to return.