I have one last question. I have booked a room for one night in Hilo on the assumption that I could rent a car at the airport for two days over Christmas. I managed to get a car at Kona airport and changed my flight to arrive at Kona. Should I now change my accomodation to Kona or is there sufficient to see at Hilo to keep my accomodation booking there? The two main points that I want to see are the VNP and the view at night from Mauna Loa Observatory.