hi, I am planning a trip with my husband and two sons, ages 4 and 6 this December. We want to fly to Madrid, from there rent a car and going to Seville, Malaga, then Lisbon in one week trip. is it possible to do a trip like that or too much to cover? what should I cut out if I need to? how is driving in these areas? any body know? appreciated you input. thanks,