Windstar accessibility question

My friend and I want to go on a cruise in the Greek islands. My friend has mobility issues; she can walk a short distance or climb a flight of stairs, but for longer distances she uses a motorized scooter. I’ve read the info on Windstar’s website about accessibility, which is helpful, but I had additional questions about, for example, trips on shore. Unfortunately they don’t answer their phone or email.

Has anyone with mobility issues taken a Windstar cruise? What was your experience? What happens on shore? Was the company responsive to your questions?