Calling on Porto experts! I am taking my mom on a trip in and out of Porto for one week - first of June, first time visit. Due to recent health issue - not a ton of walking, especially hills! We will do tours, although a car rental is certainly a possiblity if it means we will see more. Love to do day tripping if it includes a cafe lunch and wine! The river cruise is also an excellent option I think. Is a day or two to Lisbon a good idea?? What are some of the ways we could spend our time...seasoned travellers too by the way!