Try a break of day excursion to conquer the crowds, watch mild spill over the caldera
https://fengshuiatthebay.com/idiotiki-ekdromi-sti-santorini-apo-kroyazieroploio-o-pliris-odigos/
Try a dawn travel to overcome the crowds, watch easy spill over the caldera, and seize serene streets before the island wakes up.