This is where the event is being held (again) this year:
Google Maps
Note - admission is free. There is a huge parking lot so no worries about finding a place for your bike/car/whatever.
Also note - last year half the booths (and the stage) weren't even set up until after noon on the Saturday. I went there on the Friday afternoon and the site was deserted. Went back Saturday morning (9-10ish) - the place was mostly deserted.
Went back mid afternoon and there was finally some activity, but most things don't seem to be ready to go until late afternoon.