What do you mean Amtrak it back?  Can that be done on Friday night after the show?  Amtrak from Baltimore to DC you are saying?
 
 If I could somehow go up and come back via Metro/bus/light rail/walking, that would be great.
 
 Paul3Mac...you think that your idea will work both up and back?  If so, that sounds great.
 
 Thanks for all the replies.
 
 JonathanEH...if I get to the King Street Metro stop whenever you are leaving on Friday could you grab me there?  On the way back the last train leaves for DC at 2:37.  I think we'll be back in time for that.  The show can't go much past 12:30 or so, which should be plenty of time to drive from Baltimore to Alexandria at that time of night.
 
 If I can get to that Metro and you could grab me there, that would be great.  Hopefully it isn't too far out of your way to get there.