Some friends, including some homestays, will have a place to take a shower; you’d better prepare new clothes to change into ~

After drifting, there is a place to take a shower or get off the boat to return to the parking lot. There are also showers at the tourist center.
I haven’t traveled, on the way to take the train.
There are some, scenic spots have it, hostels all have it
“Oh yeah, even some hostels will have places to take a shower, so you’d better get ready with fresh clothes~”

Arriving on the shore after floating, there is a place to take a bath or one can ride an electric cart back to the parking lot and the tourist center also has places for bathing.
I haven’t floated yet, on the way to leaving by train
There are some, scenic spots have some, inns also all have.