Couple thoughts on the Lollapalooza thing:
1. I Hate Festivals. The sound sucks, it's hot and sweaty. Give me indoor shows any day of the week.
2. When I do go, it's never for the discover new bands, experience thing. Not my bag.
3. I would never go to a festival unless there was already 5+ bands I want to see. Other wise it's a huge waste of money. If it's only one band (like Beastie Boys) I would juts wait till a headlining tour, where they will be playing indoors, with a full set, and where you won't be sun burnt, and tired from standing on your feet all day.