We are a family group of three, traveling to Germany next October. We are planning to stay one week in Freiburg and from there, take Day-trips to Basel, Colmar and the Black Forest. What are our best and cheaper options to travel from Freiburg to Basel and Colmar? Take the train, rent a car? If we drive, do we need to buy any tax ticket or permit to drive to Switzerland and France? Would that be more expensive than taking the train? Any other suggestions for our 1-week vacation in Freiburg? Thanks for any advice!