We will be flying into Porto (after doing Ricks Spain tour) and after visiting Porto, will want to pick up a rental car. We then will want to drop off the rental car when we get to Lisbon a few days later. Following Rick's suggestion, we don't want to drive in either town. Rick's book suggests that the Lisbon Airport is a good place to drop off the car, then take the Metro into town. Maybe when we leave Porto, take the Metro out to the airport to pick up a rental car? I am also fine just using a Metro station on the outskirts of both towns to pickup/drop off.
Any suggestions? Thanks !!