The afternoon tour would coordinate well with a dawn visit and hike at Haleakala or a bike run down Haleakala. The morning tour starts kind of late and it's not worth wasting an entire morning over. It is informative, and you get a nice view of west Maui from the fields. The pineapples they give you at the end of the tour are small-ish, and for the money charged, they could have been more generous. I do recommend making a reservation at the restaurant across the street (Hali'imaile General Store) for a good lunch or dinner while you are Upcountry. Our tour guide, Moe, was the right mixture of perfunctory and deferent for a jaded traveler to enjoy, and generous with the pineapple tasting.