As the date approaches I recommend checking out PDX Pipeline and my site, Dave Knows Portland for Portland area events. The first week of May means you might also be in town during the Cinco De Mayo on Portland’s Waterfront – it’s a big carnival with rides, fireworks, etc.  If the weather’s nice that weekend it may be a particularly good choice of events to attend. Also I recommend visiting Powell’s Bookstore, brewpubs, and the Farmers Market at Portland State University.