The earlier you arrive to Haleakala National Park, the better. While the prize of the sun rising over the clouds is a gamble, it is well worth it. Before the sun starts to rise, the stars will shine super bright, highlighting the sky completely different from the sky on the main land.
As the sun rises, everyone will start taking photos. Some people will cheer if the sun is fully visible (and not hidden by clouds or fog). It takes some visitors multiple trips to get a clear sighting.