Visit Haleakalā Visitor Center for some helpful hints before you start exploring. It's an one-stop shop for tourist information.
If you like the word "free" as much as most do, you'll be glad to know this tourist information center is exactly that. Haleakalā Visitor Center is located in Kula. To keep your travel schedule full while you're around these parts, also stop by Haleakala National Park, Haleakala Crater and Hosmer Grove.