Are the Mogao Caves good to visit at the end of October?

Hi, it can be fine to visit then. There are many sunny days and the temp shall be comfortable. And it is turning to slack season, so there won't be many crowds and it is no need to reserve in advance. I also wanna tell you that the entrance ticket will obey the slack season fee - CNY100 from Nov. 1, when there are much less tourists. Perhaps you are willing to make a little change of your travel date.