According to this mornings voice message at ontarioferries.com all ferries are now running on normal schedule. Just to double check, here's their telephone: 1.800.661.2220
I'm leaving from Cleveland on the same route in reverse direction tomorrow, so hoping this is correct.
My alternative plan is to ferry from Catawba over to South Bass, talk up a boating tourist at Frosty Bar and hopefully hitch a ride over to Pelee. Could also hit up a charter captain after their morning run, some would love an extra payday, it's only 10 miles between islands. Failing that, spend the Memorial Day weekend at Put-in-Bay, a fine Hunter S. Thompson level event.
Cheers, hope to see you out there.