For me, it's just one of the differences between training and racing - I nearly always train with music, and I've never raced with music. Never missed it either - for my first marathon I had my ipod with me in a pocket but didn't use it as I didn't want to block out the amazing atmosphere that was around me. Even on less well-supported races, there's still a different atmosphere than when you're on your own in a training run.
Sorry to be another person saying "oh, just run without music"... but you surely weren't expecting a chorus of agreement with you on this topic, were you?
i actually found day 2 a little easier going than day 1. I felt quite sick for quite a lot of it so didn't get to eat much but thought the pit stops were very good and the people staffing them were so lovely!
BBH, I had the impression that there were points along the way where someone was checking my number off - not at the pit stops but at various points on the route the was someone with a notebook.