What is an approximate travel time by train from Breisach am Rhein to Freiburg? And then additionally to Titisee? Would like to do this as a day trip but return to reboard our rivercruise boat. Brochure indicates riverboat departs early evening...not certain how early that is. Is this a reasonable day trip to see Black Forest or am I being overly ambitous with this. Any input would be helpful. Thanks!