How to get to Jiuzhaigou scenic valley ticket window at its entrance?

I am planning to visit the scenic area in end of February 2013. I will set off from Chengdu. I have found buses go from Chengdu to the attraction. My question is, do these buses stop ( where the bus station is located)) at or close to the park entrance or I will need another bus, taxi or a van etc to reach the ticket window at the entrance ? (I am aware of the shuttle buses for hop on–hop off inside the park.)