Watch a band called Bottlecap ( https://www.facebook.com/bottlecapband/?fref=ts ) last weekend. It is in your face rock n roll with punk attitude. Would be a great warm up band for Roskilde
RF should consider booking The Love Coffin. Last year they released the EP "Veranda" which is seriously great stuff. Some aggressive psych-punk-ish (what a description.....).
They could be this years rock act like Yung/De Underjordiske/The Entrepreneurs.
I am quite curious about the warm-up program. Well okay, most of the days is just about partying and fucking around on the campsite, but some good acts can create quite special moments at Rising.