To Jinshanling: Coach vs Tourist Bus

I plan to go on 13 April. Since Coach and Tourist bus seems to be at the same cost but coach tend to leave at earlier time but just need to connect with free shuttle. Is this free shuttle always available? But if we leave at 7.00 by coach we will reach the Great Wall at around 9.00 which shuttle bus will not operate yet. So we need to walk which can avoid the tourist who come with tourist bus?

Since I cannot speak Chinese, I wonder JSL is not the final destination for Luanping coach? Then, is there anything that can tell me that I reach there or only rely on the driver in to tell me.

And 32 CNY is per trip, right? That mean round trip will be 64 CNY.

Many thanks indeed.