Oceania, Istanbul to Athens Cruise in August

[CQD]

Any suggestion on the port excursions that are offered by Oceania on this cruise? The cruise will port in Istanbul, Kusadasi, Rhodes, Delos, Mykonos, Santorini, Katakolon, Corfu, Dubrovik, Crete and Athens.
Would we be better off arrangin our own when we Port?
Are there any ports we would not need or want to take an excursion on?

[CQD]

Any suggestion on the port excursions that are offered by Oceania on this cruise? The cruise will port in Istanbul, Kusadasi, Rhodes, Delos, Mykonos, Santorini, Katakolon, Corfu, Dubrovik, Crete and Athens.
Would we be better off arrangin our own when we Port?
Are there any ports we would not need or want to take an excursion on?

[LHT28]

We have not been to Dubrovnik yet but from my research you can do this port on your own.

Rhodes you can do the Old town on your own ...take the ships tour to Lindos or rent a car & do it on your own.

Santorini you can also do on your own
lost of people on Oceania book private tours in Istanbul & Kusadasi so maybe you can find people to share their tour with you

Enjoy the cruise