Yup sure, Wananka has a sole GPS approach. This means you cannot use Wanaka as an alternate. However you do not require two different approach types (ie GPS and VOR) to fly to a destination, as the case with Wanaka.
After seeing whats happened with oil prices in the last month I think regional jets are pretty much out of the equation, for the short term anyhow. It also may have gone a long way to denting the fuel thirsty Q400 chances.