Looking at the schedule, the big acts naturally come at night, like Flosstradamus and A-Trak on Friday, Tycho and Yacht on Saturday—that's a great lineup—and Purity Ring and RJD2 on Sunday. The afternoon programming seems relatively light, although I'm sure there's lots to do out in the sunshine, on a farm well outside of the city. (There's a splash pool which should keep people cooled off.) Music festivals of late have trended towards showcasing these kind of electronic and dance acts—it's a healthy sign that we have, in the form of WTF, what is looking to be a growing one so close to Portland.
Speaking of EDM/electronic music, Spin has an interesting piece on the growth of the genre and its tandem ride with visuals and production values, to turn music made by (often) one person on a laptop into a spectacle suitable for huge crowds. They're looking at what's happening in high-end clubs in Vegas, but it's indicative of how the genre has exploded in popularity and what might come next. Check it out.
But yeah, WTF. This one's gonna be big, I think. Sandwiched between PDX Pop Now! and Pickathon weekends, it doesn't overlap with either of those primary audiences, but I think it will prove to be a significant summer music destination for the Northwest. If you're still thinking of going, head over to WTF's site for all the info.
Here's footage from last year's What The Festival. This will either look confusing, or like heaven on earth, depending on your taste and, probably, age.