A cheap way to travel through New Zealand is by bus. I discovered two companies in New Zealand, Naked Bus and Intercity bus. Not all buses look the same or come in the same size.
For example you might be staring at the back of the bus that says Johnston and on the side there’s a small sticker that says nakedbus.com. Next thing you know you stare as the bus pulls away only to come around on the other side by way of rotary (thank god for New Zealand rotaries). That’s when you grab your bags as if your Hercules and you sprint across the street and flag that bus down.
So make sure to thoroughly check all sides of a bus to determine if it’s yours.
I rode buses on both companies and didn’t notice a difference. Naked does charge extra for more than one large bag.