Good, all part of the experience.
My first festival I managed to end up in entirely the wrong small stage in the wrong field (tried to go to Small World, ended up at Little Massive). I knew something was wrong when they started soundchecking, and it sounded like a pseudo metal band.
All of these. Bolded my (potential) choices.
The National tend to close with the same 5 songs though, so I might split my time and catch the 2nd half of Sza.