I attended the one in eugene and it sucked ass so bad it was depressing. Normally they have the celebration outside of the city limits, but this year they wanted to accomodate more people who don't drive, so they had in within the city limits, right smack dab in the heart of town...surrounded by cops. Boooo! Barely anyone showed up both days it was running. It was very sad.
I'm going to HempFest Boston this year, when is it? September something or other? I went for 4 years, missed last year, and now I'm really excited to go again. I hope the weathers nice though, one year it rained and everyone crammed into a tent. Regardless, HempFest is always a good time.