Hi @bböp, I signed up to respond.
I spent last weekend at this festival and Wilco was one of my key reasons to do so.
After two hot days on Friday and Saturday, Sunday was much cooler and possibly as a result the crowd was smaller.
I was able to get close to the front for Wilco. I've included a pic.
I thoroughly enjoyed the set, more than my hometown show in London in August. Good mix of songs and it was nice to hear California Stars in California, sadly there were no stars visible.