Stay at least 2 nights to explore the steam vent trail and tubs. I was surprised going to the tubs at night and being surrounded by a cacophony of noise making animals, highlighting how dead the suburbs are. The location was perfect for exploring this end of the island. When checking in, the entrance is a simple aluminum farm gate with a small sign that says "Puna Rainforest" so don't expect a keypad or fancy facade to discriminate it from other properties.