We're only going to be in Santorini for a few days, and would love a private tour to run through a lot of the big sites. Any recommendations?
We stayed on Santorini 4 nights and one of our activities was a guided bus tour. It ended in Oia at sunset. The tour was arranged by one of the travel agencies. It was similar to this one: https://www.tripadvisor.com/AttractionProductReview-g189398-d12561542-Santorini_Day_Tour_with_Sunset_in_Oia-Greece.html
Our tour included the village of Megalochori, lunch & swimming at Perissa Beach, and a stop at Red Beach. We enjoyed wine tasting at the last stop. The highlight of our tour was the Archaeological site of Akrotiri. All in all we were very pleased with the tour.
We used "Touring with Kostas" and were very satisfied. Kostas is very personable & knowledgeable. He offers a variety of tours including an "A la Carte" option. If his services look appealing to you, I would contact him immediately to see if he has availability, https://santorini-private-guide.com/