I am planning to go to Jiuzhaikou within 2 weeks, but want to take a very safe and free-of-mind trip.

any recommendation :
from Chengdu airport to jiuzhaikou - by air or by car? can we rent a car & driver for 4 of us?

what are the must go places in jiuzhaikou? can we hire a private car there within jiuzhaikou?

is sheraton the best hotel there?

thanks! ccyu