We booked the Panarea, Vulcano, Stromboli trip. It is long, about 12 hours - but to see Stromboli exploding at night was worth every minute of the long day spent. The tour, on a private boat which took about 150 people was very well organised. We had a hotel pick up and on board the commentary is in several languages. Good coffee and snacks available and the stops were great. Take your swimmers in summer and a hat and a light top for the night journey back as it cools down a lot. Get out on deck after a quick meal (included) and wait for the fireworks. I hope you are as lucky as we were as we witnessed 4 eruptions!!