@alserrod @Hlitner @GAgaltravel@abouna
And here is the grand slam scenario. We were staying at Monterosso for three days. On day 2, there were high seas so the ferries did not run AND there was a train strike for the Cinqueterre line only on the same day! We had a wonderful beach day, but I am sure there were many disappointed people.
So, check the "sciopero" website for scheduled strikes and keep your options open. Do try for the ferries at least one way because the views are wonderful, but have your train info ready just in case. If there is a scheduled train strike, check the weather report for the ferries. If all goes south, improvise.
Enjoy. It is a beautiful place.