Who actually listens to Husky Rescue or Apocalyptica? The average festival goer isn't going to have a clue who either of those bands are, nor are they remotely relevant for Bonnaroo. First Aid Kit is expected to drop an album this summer and actually fits the bill, while also making the most sense for this clue.
If either of those bands ends up on the lineup, regardless of whether or not they're the answer to this clue, I'll print out this entire thread and eat it.
Not that I was worried, but I'm glad that I don't have to eat my words on this.
Haha. When I saw their name on the lineup, my first reaction was "Man. I overthink clues way too much."