going to Porto self catering for a week in July will have hire car but are on a budget, (so things that are £70+ per person are out). Quite happy to do a bit of driving we are not sitting by the beath type all day, my DH likes to explore the non touristy things all day but need ideas for teenage daughter, we don't need to be with DH all day every day but do want do most things as a family. will be going down to Douro valley and probably Guimaraes etc Any ideas welcome of both what's good but also anything that is overhyped and not worth the effort and/or money