Try a first light journey to overcome the crowds, watch faded spill over the caldera
https://www.scribd.com/document/1036687577/Santorini-Luxury-Tours-Yachts-Helicopters-and-Five-Star-Tastings-135232
Try a dawn tour to overcome the crowds, watch mild spill over the caldera, and seize serene streets before the island wakes up.