I'll be attending a conference in a few weeks at the Baltimore (MD) convention center and I'm curious about the Marriott hotels nearby. Particularly the Marriott Inner Harbor and Renaissance Harborplace but also the SHS Downtown/Inner Harbor. How nice are the rooms in each one? How walkable are they to the BCC and places to eat? (I would hate to be on the wrong side of a highway, for example.) Any reason to-- gasp-- consider staying at the Hyatt next to the BCC instead?