Appreciate it, Dana! I am pretty comfortable with sleepily taking a Lyft to the station and napping on the train.
And of course your MiL contingencies gotta continge, Jen. Will be great to see you if possible, with or without the ride! Was vaguely planning on figuring out local transit and will keep that as a backup in case it is needed. Nephew's remarks were that DC and Baltimore Airport stations were both pretty close, I might have misremembered where he actually lives. I'll need to make sure I have the right address before then . . .