Is it better to travel with a group in Lushan Mountain or go on road trip?

It depends on personal preference. In fact, it is not much different from the total cost of group free travel. It's no trouble to join the group, but there are many traps. Free travel is free, and preparation is troublesome. Lushan Mountain, a famous scenic spot, has done a good job in guiding principles of scenic spots and facilities. If you are just visiting Lushan Mountain, I suggest going to road trip. Download a donkey guide APP and listen to it wherever you go. Personally, it is more convenient than listening to a tour guide.