Will be at a convention in June. I have a couple of choices of hotel, either the Sheraton,3 blocks from Convention Center or Marriott Inner Harbor, 15 blocks from Convention Center. The Marriott sounds really nice...but is there good transportation between that area and the Convention Center? Another option would be to stay at Henderson's Wharf, but that is quite a distance from Convention Center. If I was pretty sure of good and safe public transportation I would feel a lot better with my choice. Anyone out there have any advice for me?