I know there are many of you from New York, Philly or Delaware coming to Baltimore for the conference. If you are coming by train (easiest way), I HIGHLY recommend that you buy your tickets on line by next Monday. The reason is that there are 20% discounts on the Northeast corridor if purchased 21 days in advance. I just bought mine.
Be aware that on Sundays trains sell out and prices can vary a LOT by time (it's like airlines)
Parking near hotel can be pricey and you don't need a car there.