Haleakala offers stunningly beautiful sunrises and unobstructed panoramic views of Maui. You can camp within the crater at Holua Cabin. If the cabins are booked, there is a nearby campsite within the crater where you can set up a dry camp on an overnight backpacking trip.
Remember to bring your sunscreen, plenty of water, layers of warm clothing. If staying overnight temperatures can get quite harsh. The hike going into the crater is deceptively easy, the switchbacks on the way out can be very challenging, especially with the gains in elevation.