I did a trip to Sorrento in February. had a great time. I stayed at the Sorrento Hilton. great hotel. room had balcony view of the bay. it does pretty much close down but there were cafes open. city bus down almafi coast was great. train up to Pompeii. ferry to capri. if you have never been, don't let the month stop you. check prices for the Hilton. I would think prices in the summer would be very expensive so for me to see it means off season.