The only festivals I go too are the ones I either get to play, or the ones where I go to work. As a visitor? Almost never. I always feel like a walking wallet, everything is so damn expensive.
As for festivals that actually rock, the university where I work holds a concert every year called Radboud Rocks! Except they never rock because all I see there in the years that I work there are rappers, DJ's and pop singers. But this year they finally have a rock band. A local rock band participated in one of the nation's talent shows, so they played themselves into the picture enough for the university to finally book an actual rock band.
And that's how you have to do it these days, boys and girls. Working on your own music, playing the club scene, releasing albums, it doesn't hurt, but if you really want to be successful you gotta be a youtube hit or join the reality TV circus.