A few tips:
The bus to Amalfi this time of year is not crowded. You can get the SITA bus in front of the train station. It’s about a 90 minute ride to Amalfi. Once in Amalfi you can get another bus to Ravello, which I highly recommend doing. We did this as a day trip and it is very doable. If you are going to do Capri as a day trip, take the Fast ferry from the pier which will have you to Capri in about 20 minutes.
Try not to have to break a large bill as they do not like making change.
The fare is approx 18 euros round trip per person.
Once in Capri, you will have to decide how you want to get around the island. Everything is pretty spread out. We tried to walk but it quickly became apparent that that was not an option.We went back to Marina Grande and examined the options. We could have taken a boat tour that takes you around the island, then drops you at the Blue Grotto. But you only get to see the island from the boat. We wanted to see a bit more.We decided to hire a taxi to transport us around the island, bring us to the locations we wanted to see, wait for us as needed, and bring us back to Marina Grande. It cost us 100 euros. The driver was wonderful. As he drove us around he explained the details of each location, brought us to the Blue Grotto, waited for us to take the canoe into the Blue Grotto, (which was wonderful), then he brought us to the spot to catch the lift to the top of the mountain, we went to the top and it was spectacular. We were blessed with good weather. He then brought us to Capri city, then Anacapri, then to an exclusive area to see the extreme wealth on the island, then back to Marina Grande.Because of how Capri is laid out, the taxi was the most efficient way to see most of it, and do the things we wanted to do.It rained the day we went to Pompeii but we saw most of it. We did have to forego Vesuvius.
But we will go back soon.