I know the crowds in August are going to be borderline apocalyptic. I read the RS guide to beating the crowds there, and we do plan to spend 3-4 nights, so we can structure most of our activity around the early morning/late evening hours when it won't be so mobbed. We definitely don't expect to have quiet streets to ourselves or anything -- but just want to make sure the crowd situation won't be dangerous for our 8&9yo kids. They're pretty travel-savvy, but from what I've read, it sounds like the train stations can get dangerously crowded, even for seasoned travelers.
We'd primarily only be on the train from La Spezia to Monterosso, and the traveling by ferry once we're settled. But it sounds like La Spezia is where we'll be dealing with the biggest crush of the crowds, from cruise ships and day tours -- is that a correct assumption? Is there a way to avoid it, i.e. staying in Portovenere?
Last but not least -- should we consider just replacing CT altogether with Sorrento, or will that be just as crowded?