If you don't want to pay for a boat taxi, you can do an out-and-return walk to Coquille Bay from the start of the Abel Tasman Track near Marahau. It is about 6 km (3.5 miles) round trip, (3 km one-way), with a small hill you need to walk up. About one and half to two hours of walking time, and 135 metres elevation change. (I.e. A 70 metre hill to go over there and return.)