First time in Portugal. While we would like warm weather and the beach, we realize that could very likely not happen. However, looking for suggestions about a good way to spend 7 days there. How many days should we plan for Lisbon? What are good day trips from there? Is it better to rent a car and just drive south to the Algarve - or take the train? Or should go in the Alentejo along the coast? ANy ideas appreciated.