Turkey trip ideas for a group of retired friends?

A gulet cruise is perfect: no packing, swimming, food on board. Add Istanbul and Cappadocia with a private guide and driver.

Private minibus with driver for comfort.

Ephesus with a guide.

Avoid July-August heat.

Pamukkale is easy from the top gate.

Book hotels with elevators.

Boat tours on the Bosphorus.

Turkish baths.

Culinary tours.

Slow pace, one big thing per day.