Do you have any overage days? Also you still have to pay the taxes and fees from the airport pickup. I just used my Hertz points for a free week in ATL a month ago and I still had to pay almost $200 in airport taxes and 1 extra day rental. I also upgraded at the desk for an extra $20 a day into a GMC Acadia since the Toyota Camry in my spot was not adequate for my long drive with the kids.