Reasonable price for hiring a car in Jiuzhaigou Airport

I'm going with my mother to JZG and Huanglong in June and I would like to have an idea of reasonable prices for a trip around there.

First Day: We will arrive around 08:35 AM at JZH Airport and we would like to go to the Huanglong Scenic Aereas for a visit, then go to the hotel (Holiday Inn) in JZG arriving there at night.
Second Day: We do not need the car service, as it's easy to go the the scenic areas around Jiuzhaigou by taxi.
Third Day: We do need the car service again as we fly back to Xi'an departuring at 09:30 AM, which means that we should leave our hotel in JZG around 06:00 AM. Right?

So what would be a reasonable price to pay to the driver when I negociate the whole trip? I speak chinese so a translator isn't needed for the trip.
Thanks in advance!