If you were to prebook it is not a problem to adjust your pick up/drop off dates (subject to availability). During peak season you will need to give us as much notice as possible. There is no cost involved to change your dates. However, the daily price of your new travel dates might by higher or lower. But there will never be a change fee when you book a Spaceships campervan. That is why many travellers annually become Space Travllers and book a Spaceships campervan in New Zealand.