Sister and brother in law from UK (in their 50s) have got six days in the South Island in early Jan, and want to take in Queenstown and, ideally, Milford Sound. They will have a rental car and enjoy scenic drives, but max 3 hours a day so they're not spending all their time in the car. They're big fans of natural scenery vs 'thrill seeking' activities (bungy jumping not on the ageda!) Couple of options:
Christchurch to Queenstown via Mount Cook, then Milford - stopover in Te Anau? or better to book a tour from Queenstown?
OR Dunedin to Invercargill/Bluff (scenic drive on coast road via Caitlins) and then onto Te Anau, then Queenstown.
Also how settled is the weather at Milford in Jan - do you need to 'budget' for more than one day at Te Anau so you can choose the best day for Milford (presumably it's not a good trip on a cloudy day?)
Thanks for your help.