The running order isn't decided yet, so it hasn't been announced which day they'll be playing yet - that will only happen after they've announced around another 40-50 bands. We'll be going for all four days anyway, its a great festival. I'd recommend it to anyone.
The trip over is the only downer for us, we need to fly to London, then fly to Malmo, then get a train to Kristianstad, another train to Solvesborg and finally a bus to Norje. But its really worth it. :D