It's definitely worth staying overnight in Hana if you have time, since this region is SO different and interesting compared to other parts of the island -- especially for nature lovers and hikers (do the Pipiwai trail!). If you do stay overnight, stay at Tania and Kaua's! It is conveniently located in the center of Hana town. And ask these hosts for their local tips -- their wisdom was gold. Thank you for a great stay!