Went with Waiki tours. We were driven to the 5000m mark, then walked for 45mins with our packs to camp. Yes, I say walk rather than hike because it was pretty much flat. We then had all afternoon to rest, aclimatize, and eat. Went to bed at 5pm, but didn't succeed in sleeping. Got up at 1am, a quick bite to eat and drink, and we were off. The weather was perfect without any wind and a mostly full moon. Reached the peak after a tiring 4hrs and 15mins, just before sunrise. Spectacular sunrise and views all around. Came down to camp in 1 hour. Rested for a few hours, packed up, and went to await our ride back to Arequipa.