Your friends are the people you know best, right? There are no boundaries, which makes it way easier than photographing strangers.
Festivals do not only offer a great spectacle on stage, but also on the campsite. Visitors make the festival to what it is.
In early 2015 I followed the German experimental Noise Rock duo Dyse from Berlin through the East of USA, passing cities like: Philadelphia, New York, New Orleans, Florida, Austin and many more. A tour documentary is in the making.