The smartest thing Garelick and his team do is resist the obvious version of this movie. This could have been 99 minutes of a middle-aged man being confused by rap music. Instead, the festival is treated with affection rather than mockery. The crowd is a character, the bass is a co-star, and the film understands that for a lot of teenagers, this isn't noise - it's identity.
Owen Wilson is perfectly cast as Hank, and it's not just the easy joke. His signature drawl, usually deployed for ironic distance, here becomes the sound of a man genuinely out of his depth and refusing to quit. The panic in his voice when Zion disappears is real, and Wilson sells the quieter shame underneath it - the fear that he's already lost his son and this trip is a last-ditch audition for relevance. Christian Convery is excellent as Zion, playing the kid's embarrassment and gradual thaw without overplaying either. The father-son scenes, especially late in the film, land hard.
Matt Rife and Christine Ko make for a genuinely funny pair of allies, giving the search a comic momentum that keeps the middle stretch from sagging. Henry Winkler shows up and does exactly what you'd hope Henry Winkler would do. Travis Scott and Sexyy Red appear as themselves, and their presence grounds the film in the actual culture of the festival rather than a Hollywood idea of it. The cameos are fun without becoming a distraction.
Where it wobbles is in the last act. The escalation that's been building hits a point where the comedy starts to crowd out the emotion, and a few of the bigger set pieces run long. There's also a tonal gear shift near the end that the movie doesn't quite earn - it wants a rousing catharsis, but it's spent so much time on chaos that the pivot feels abrupt. The resolution to the secret-keeping plot thread is tidier than the mess the script created, which undercuts some of its own honesty.
Still, these are the quibbles of a movie that's aiming higher than it needed to. The music is used well - not just as wallpaper, but as the connective tissue between father and son. The film's best moments aren't the gags; they're the small ones, like Hank watching Zion mouth lyrics he doesn't know and realizing he's seeing a version of his kid he's never met.