A tip I have about this place — 10 months ago
This is the most beautiful place we went in Greece and certainly one of the most beautiful in the world.
I would recommend renting a car or moped(s). I would personally stay in Ia if I get a chance to return although where we stayed was amazing. Take the time to get to and eat the fish in Imerovigli. Spend as long in Santorini as you can!