Check out the website here: http://rockfreaks.de/festival/. This year some of my favourites like Truckfighters, Motorpsycho and Papir will be headlining. Not that I can understand most of the website or the emails I get from their listserv. Yes, I used to live in Germany but it's been a looong time.
Last year, apparently one of the best shows was by a band called Causa Sui, a stoner jam band from Denmark who never cease to blow my mind. They are a four-piece who essentially take the blues-metal theme and expand it into a layered and structured psychedelic jam for every track. There a very obvious nods to Kyuss in their choice of guitar pedals and riffs, which is a big plus for an old fan like me. They do it well most of the time and they do it without a vocalist.
They have just released their 8th album, a live recording of last year's performance at Freak Valley. Here's a clip:
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