Rotorua,  The spa city of the south pacfic,  known for its strong maori culture it is also one of the most action packed cities you can visit.  Hens can be pampered by relaxing in the world famous spas and the stags can zorb or luge till their hearts content.

Scenic flights,  walks on Volcanos and bungy jumping can keep your stags and hens busy during the day, then hit the Rotorua nightlife and party until dawn.  Accomadation is some of the best in NZ if you need it and there are plenty of resturants before the festivites begin.

Traveling to Rotorua is dead easy, why not make it a long weekend.