It's really not that far away. You can fly direct from National Airport, it's a short flight and airfare is super cheap these days...probably cheaper than tix to see Eddie Vedder
Actually tickets are $200, which is not cheap. Wait a month or so and that will likely change. Deals will continue to pop up. But don't forget the hotel costs. Not a cheap trip when you factor in tickets. But, I'm proud to say I am finally going, regardless of the costs. And, unlike Bonnaroo or Coachella, this is in the middle of an amazing city, lots to do, see and eat, and very comfortable hotels to sleep and shower in.
(yes, i know there are hotels at coachella, but a lot of people do camp...)