We made an unexpected visit to Corfu via cruise ship in January 2019. Winds were too high to get in to Kotor, so Corfu was subbed last minute. We had a very nice day there.

We had a car and driver take us around - though with planning I am sure you can get everywhere on the bus. A highlight was the Monastery of Paleokastritsa and surrounding beach/coast on the other side of the island. Definitely make a day getting out there, exploring, and getting back. Our driver took us through some villages up high in the north center of the island on the way back - cool to see and great views as you come back to old town - perhaps see if there is a bus that takes the long way back to town.

We went in winter and there were ATMs many places - like by the Kanoni Cafe/airport overlook. But in winter some of the ATMs were closed - including that one. I found myself without cash there and unable to buy a drink. Would assume ATMs are still open in September, but maybe not if Covid has emptied the island. Always good to have some cash.