New Zealand in 3 Weeks: The Campervan Route for Both Islands

Is 3 weeks enough? Yes, with the right focus

Three weeks in New Zealand by campervan is tight, but you can plan it well. The key is not trying to see everything. Visiting both islands is possible, but if you try to tick off every spot from the guidebooks, you'll rush through it and enjoy nothing.

Our route starts in Auckland and ends in Christchurch. The Interislander ferry between Wellington and Picton splits the three weeks into two natural halves: just under ten days on each island, plus a travel day for the crossing.

Overview: the whole route in 21 days

The route is divided into three stages: around ten days on the North Island, the ferry crossing as the connecting point, and around ten days on the South Island. Scroll through the trip stop by stop.

Our tip: Doubtful Sound instead of Milford Sound

Milford Sound is in every guidebook, and you notice it the moment you arrive. Tour buses from Queenstown fill the car park, and several boats are out on the water at the same time. The fiord is impressive all the same. But if you can spare another two or three days, drive to Doubtful Sound instead.

Doubtful Sound is far bigger than Milford, roughly 40 kilometres long with several side arms, and only a fraction of the visitors get there. That comes down to the journey, because no road leads to the fiord. You drive to Manapouri, cross Lake Manapouri by boat and then take a bus over Wilmot Pass down to Deep Cove, where the cruise starts. A day trip therefore takes seven to eight hours, an overnight cruise correspondingly longer.

In return you get something Milford has largely lost: silence. Out in the fiord the skippers switch off the engines, and for a few minutes all you hear is waterfalls and birds. Dolphins and seals are almost a given, and in spring you may see Fiordland crested penguins. The trip costs more than a Milford cruise and uses up a full travel day. We think it is worth it, because you experience the fiord without standing in the tourist stream.

Practical for the route: stay in Manapouri or Te Anau rather than Queenstown, which saves you the long drive in the morning. From Queenstown it is around 170 kilometres to Manapouri, a good two and a half hours. If you want to see both, take the Milford Road as a drive and plan Doubtful Sound as a day of its own.

Practical tips for 3 weeks

• Less is more: better 3 to 4 stops a week than 7. The best moments happen between destinations.
• Book the ferry early: for December to February, book by October/November at the latest, otherwise there won't be space for the camper.
• Build in weather buffer for Milford Sound: statistically over 200 rainy days a year. A buffer day or a flexible departure day makes all the difference.
• Alpine Crossing shuttle: without booking ahead, there's no Tongariro Crossing. That's not an exaggeration.
• Offline maps: there's no mobile network in national park regions. Download the Google Maps offline areas beforehand.

Which camper for this route?

For a 3-week route across both islands, a self-contained vehicle isn't just nice to have, it's practically essential. In national park regions like Tongariro, Mount Cook or Fiordland, there are barely any holiday parks. What you'll find instead are plenty of DOC campsites and freedom camping spots, and most require an SC certificate. Without a certified vehicle, you'll be significantly limited on this route.

The Trustee Traveller is the most popular choice for this route: self-sufficient, comfortable, and easy to park. Couples who want more comfort are better off with the Super Traveller, which has more space and a wider bed. Both are self-contained and come with everything you need for freedom camping.

A practical tip: pick up the vehicle in Auckland and drop it off in Christchurch. This saves you the return trip on the ferry and turns the route into a clean north-to-south line without doubling back. One-way rentals between Auckland and Christchurch are available with us on request.

Common planning mistakes and how to avoid them

The most common mistake on the 3-week route: planning too many kilometres per day. 300 kilometres on New Zealand's back roads isn't a normal driving day, it's a long and exhausting one. Keep driving blocks to 2 to 3 hours and always follow them with an activity or a rest.

The second mistake: booking the ferry too late. In peak season from December to February, vehicle spots on the Interislander ferry are booked out weeks in advance. If you book the ferry at the last minute, you'll either get stuck with the wrong departure time or not get on at all. It's best to book the ferry at the same time as the camper.

The third mistake: not planning any buffer days. Milford Sound gets over 200 rainy days a year, the Tongariro Alpine Crossing closes when it snows, and sometimes you just want to stay two nights by a lake because it's that beautiful. A route with no buffer leaves no room for these moments. For 21 days, plan at least 2 to 3 free days with no fixed destination. These often turn out to be the favourite days of the whole trip.