Thanks so much for the good wishes, everyone!!! I just got back from slogging through the streets of Baltimore!
It was a very hilly course, full sun and 74*F - so I was a bit slower than I had hoped. 5:59:59 watch time after I had crossed the finish line - exactly the same as the Chicago Marathon a year ago!
Except I have to put an asterisk by the time in my records - the police changed the course in progress and made us cut the course by about a block in an out-and-back between miles 20 and 21. It probably gave me 2 to 3 minutes - which I might have been able to make up in order to get in under 6:00, but I'll never really know! Grrr! And they said the course would be open 7 hours.
Long race report to follow, some time soon. But Marathon Number Seven is in the books, and I lived to tell the tale!