Reed flute cave and Li River cruise

I was wondering how much walking is involved in both of these places.
How far is it to walk from where you would be dropped off by car/bus to get into the cave and onto the boat in these locations?
In the cave is there a lot of walking or are there places to sit so that you can admire the cave without walking? Are there lots of steps to get down into the cave and do they have a hand rail?
Thanks for your information.