Santorini is a MESS! A business owner there told me that Chinese people will come there to get their wedding photos taken. Not to get married, just the pix! We hated it.
Just because they CAN do something doesn't mean they should. These aren't small amounts of money that are changing hands. I'm getting better service than this from AMAZON!!!
I have about TEN pairs of Rothys and now my feet have gotten wider so I got a pair of these, aimed to people with wider feet. (My doctor told me that as we age the arch in our foot starts to flatten and make your foot wider. Dagnabit) I love the new ones.
https://www.vivaia.com/
Someone above mentioned Santorini and the crowds! Since your kids are school age you may want to avoid Greece over Easter. It's a huge holiday and crowded of course. Have fun.
I have a puffer jacket but it needs something over it in the rain. I got a cheapie, almost rubbery, knee length with a hood and pockets so no umbrella most of the time.
I worked in a library and supported them. There are still people, esp. children, who don't have access to computers. Amazing, I know. But as far as a cruise ship I just find them a quiet place to go.