The only access to it by car/bus is from Kaiteriteri in the south (close to Motueka) and from Pohara in the North. Between these two points you can only hike or take a boat. And the boat tickets are quite expensive. It quite a while until we figured out how we can do what we wanted to do: go be boat from Kaitertrei (the main point) to A hike 2-3 hours to B and then take the boat from B to come back to Kaiteriteri. The next day we bought a three day pass from the company called Wilson and took the boat to the point called Tonga Quarry.
The Abel Tasman NP is covered in native bush, interlaced with walking tracks and surrounded by clear blue/green seas and welcoming bays with golden sand.
Passed by boat several bays and beaches in alternation with some forests and cliffs. Eventually got off the boat on a sandy beach and then hiked through a forest close to the shore for ca. two hours before arriving to next sandy beach where other 20 people were waiting for the boat to pick us up. Everything very relaxing an no hassle at all! The hike was very easy. The water is so turquoise that you could think you are in the Caribbean.
The other day we went by boat from Kaiteriteri to Torrent bay and then we hiked to Anchorage. The last part of the walk was on the shore which during low tide was not covered by water. Then a boat picked us up and we got off at Kaiteriteri where we had a wonderful swim in the sea. Gorgeous!
Our last stop on Southern Island was Picton. Picton is a small city but it is the main port for transfer to North Island and also the best base for tackling the Marlborough Sounds and Queen Charlotte Track.