Will travelling be problem during Mid Autumn Festival this year? Is it like Chinese New Year?

We will need to travel on the weekend of Mid Autumn Festival (Sept.12). One person needs to take a plane from Chengdu to Beijing. Will it be difficult to make a reservation only 3 days in advance? Or should he make the reservation now? The rest of us are planning to visit the Bamboo Forest 竹海(宜宾) and then go to Langzhong 阆中 via 大足. Will buses and trains be very crowded? Will we need to make a reservation for hotels in advance? Is it possible to get a private car with a driver to take us to these places from Chengdu?