We when to see the Warren & Annabelle Show two years ago and it was great! Would go back in a second! Very, very funny and amazing magic! Not over priced when compared to everything else in Hawaii.
During that visit to Maui we also drove up to Haleakala, but not for sunrise. We arrived on top about noon, but it was still cold (January). It is a great drive and I would recommend it. A sunrise trip would have been OK, but we could not get going that early. You can plan on about a 3.3 degree drop in temperature for every 1000 feet increase in elevation. The summit is slightly more than 10,000 feet. Therefore, depending on the temperature at your hotel/ship (sea level) you can easily do the math to figure out what the approximate temperature will be at the summit.