As someone who lives in Maryland, and relatively close to where Otacon is held (okay, by close, I mean 45 minutes away, but it's closer than the rest o' y'all), and one thing has always amazed me; how is it that all the geeks in costumes at that thing don't get mugged…? Have you BEEN in Baltimore recently, outside of this convention?! Ever since O'Malley took over, that place is a cesspool with a nice harbor. Hell, a buddy of mine was nearly carjacked down there, and I know the convention hall is just a stonesthrow away from the location of said near-jacking...
On the upside, while you're all there, maybe you can meet the junkyard cyborg, or the man with flashing lights in his teeth... Seriously... Real people...