No problem, yeah I did the same except I left it much later than I should and it arrived a couple of hours after I had already left.
I personally just chilled in the arena on some chairs (yes i'm one of those lol), and would just head off and snap some shots if I felt like it or liked the band.
This year I also figured out how to take semi-decent pictures in low light so I finally got pictures of the headliners and some of the bands in the tents so that almost doubled last years count as it is. You'd think after 8 years of having this camera I would have figured out how to use it