We have a minivan booked on Maui for 9 days in March.

Our travel plans have changed and we will be staying an extra day.

Trying to re-book on the website or by phone, by staying one extra day our rate goes up from $809.27 to $932.xx, an increase of over $120.00 for one day.

If we keep our existing reservation and just return the vehicle a day late, will it work out in our favour versus changing the reservation to the higher rate now? Or would we be better off attempting to extend the reservation when we arrive to pick up our vehicle?

Alternatively if anyone knows a cheaper way to book a minivan (need a vehicle that carries at least 6 passengers and luggage) can you let me know?