I am leading a group of 20 paxs to Jiuzhaigou on 22 Sep 2011, it's safe to travel?

Sep is a good season to visit Jiuzhaigou. However, it is difficult to say whether the road to Jiuzhaigou from Chengdu will be affected by rainfall and debris flow. You'd better pay attention to the weather forecast before leaving.
On the other hand, if you will fly to Jiuzhaigou directly, the road should be fine at most time.