Kevin,
I just took a brief look at the itinerary for this, and saw that In Miami, we begin and in in the far south part of Miami at the south dadeland station. Is there a reason why you are starting here and not at a location in cenral Miami?
The Dadeland South start point is only arbitrary. There is little chance anyone will be staying that far south. Most likely we will get on that Metrorail train further up the line, at a slightly later time. Just like the California trip, once peoples' hotel choices are known, the boarding times and locations will be updated. But so far, 10 months in advance, only one person has booked any hotels.