Hi guys! New here, would like to ask for some advice. I'm travelling to NZ, arriving 3rd of June and departing 15th of June. I know it's winter season, and I'm doing a self drive trip. No experience driving in ice/snow conditions, but never try will never have experience right? Would like to know roughly how much buffer time to add to a journey, as of course would drive slower when unsure (60km/h or less?) and assume never keep stopping to see scenery, and surely include like 15mins break every approx 2 hours drive. E.g. Christchurch to Hokitika is around 3 hours 20 mins drive on google maps, how much buffer should I add? 20%? 30%? Thanks in advance!