I had a backpacking trip to the Eagel Creek Loop in Oregon nearby the Bonnie dam along the Columbia river during the Memorial Holidays (5/28 ~ 5/30?2011) with my wife and one other couple and had a great time. This is also very popular trail in Oregon which have a bunchbowl fall, Tunner Falls and more falls.
You may consider this course as your future trip. If you want, I can send more detail info.