I see on your site that you have already visited the historic highway through the Gorge, but it would merit a visit again, and the fall colors should be reaching peak color around the time or your visit.

You may also be interested in the Hood River Fruit Loop as your timing will put you at the peak of harvest season there, and yet more fantastic fall color.

Do the entire loop around Mount Hood following Highway 35, and make a stop at Timberline Lodge to get up close in personal with the mountain. It may even greet you with some fresh snow.