I'll be arriving in Portland on Monday, and I've had very little time to do research. My schedule will allow me plenty of sightseeing time Monday afternoon, and all of Tuesday. I will be attending a seminar the rest of the week, and plan to see the 'city' sights after classes.
I'll have use of a car for the trip and will be staying at the Hilton Executive Towers. The Columbia River Gorge is a must, and I was hoping I'd get a chance to see the sand dunes as well, but don't know if that's pushing it.