I took the Train tour this past January and will be taking it again this December. I was told to drive to the Contemporary and tell the attendant that you are there for the Train tour. This is what I did and it worked fine - provided you have a car. From the Contemporary, you can just walk to the park and there will be someone from the Tour waiting for you. If you don't have a car....I don't know the answer! It's a very interesting tour.