Besides the traditional metal festivals with stages and often a proper camping ground these days a new form of festival seems be more and more popular. I'm speaking about all of the cruises that put a bunch of bands, lots of lights and stages plus all the fans on one big ship and let them do a trip of their very own.
Besides other big festivals like the Sweden Rock the biggest one called Wacken Open Air has also done a cruise of their own entitled "Full Metal Cruise". It took place from 5th to 12th Ma 2013 and did feature 20 Bands on three stage on stage and also at the boarding location. Among others the following bands were performing: KREATOR, SABATON, AVANTASIA, DORO, HEAVEN SHALL BURN und FIREWIND.
If you'd like to see how this turned out, hurry and head over here. The german TV station ZDF did broadcast a 77 min. long documentation about the event that still can be seen for some days in their media streaming service. Check it out!