Late February can be a time of heavy rain in Maui, and Hana is the side of Maui with a lot of rain.
https://www.govisithawaii.com/2014/0...th-and-island/
I would not choose February to plan a days-long visit there, with the risk of heavy rains and landslides. Furthermore, you say that you are wanting to hike the Haleakala trail: Are you planning on hiking up the trail from Hana? Again, heavy rain can make it dangerous to hike it. Now if you were using Hana as a base of operations, it is not convenient as a base to visit Haleakala or anything else on Maui.