I flew an Island Airways Trimotor in 1981 when I was just 6 years old. I think at that time they only had one or two trimotors and they just did sight seeing flights from Port Clinton at that time, didn't fly to Put In Bay. That service was stopped after a crash.
Island Airways also had a couple Otters or Beavers - I don't remember which - but a big radial single engine piston plane.
I also read that the Island Airways Trimotor got destroyed in Andrew at Kermit Weekes old location at Tamiami - south of MIA
, but didn't know it was under restoration. Kermit Weekes has a Ford Trimotor at his current Fantasy of Flight location that is painted like the Island Airways trimotor was (red white and blue), but doesn't say Island Airways on it.