We are a senior couple planning a trip to Portugal and southern Spain in October for 28 days. We are flying in and out of Lisbon and are planning (at this point anyway) to backpack and not book too many places in advance. I had hoped to include a Douro river cruise for about 5 days but it looks like most of the October cruises are booked. Maybe a week in the Azores? This is as far as I've got..4 nights in Lisbon! then thinking Porto...over to Seville..Granada, Cordoba Ronda.?..We would like to spend the last 5 days or so relaxing ..Malaga, Nerja? Algarve? and then back up to Lisbon to fly home. I am getting overwhelmed with this..hoping I could get some good info whether or not this is too much in the time we have. Thanks for any info you could pass along.