We did a day trip from Wailea past Hana and all the way to Waiki falls. We left at 8.30 and we were back at 6.30 (10 hours).
The drive out was nice as we were close to the mountain and it was early in the day with a couple of fascinating stops.
The drive back was pretty scary as we were close to the cliff and the road past Hana doesn’t always have a rail. It was also pouring.
Narrow road with lots of blind corners and careless drivers (impatient locals and inexperienced tourists)
I would not do it again or recommend it as I was concerned about our safety which took away from the beauty of the drive and stops.