Originally Posted by
carla568
At the airport itself, the top 5th floor of a parking garage (E? A? B?) might be good. Easy to walk to. If you like watching planes land and if they are landing to the south, "Founder's Plaza" is a short drive.
Your rental car is a hot commodity. Lots of places are sold out. You might keep it and drive farther away if there are clouds.
If my PDX experience of a few years' back is any indication, don't wander far from the airport. It could be faster to walk back than to drive back.