First, you could go to the Gilroy Garlic Festival. Gastronomically, this is probably your best bet, gastrointestinally, it's questionable. Sadly, they aren't running the train down there this year, which really takes the fun out of it. If you can't make it, but don't want to miss out, you could check out the live web cam. It kinda loses something without smell-o-vision, huh?