Getting an autograph can be easy or darn near impossible depending on the artist. Some performers sell "Meet and Greet" packages. Lana Del Rey signed autographs for attendees who were in the front of GA during her setlist. The guys from Dishwalla were hanging out in the fenced area near concessions by where the bus drives people up. I'm on board with the "get there early" approach. I've never seen an artust sign after their show.
Get there EARLY!
I'd find out when the sound check was, or go early before the show.
I have no idea how you would get an autograph. I've only been there once
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