By the time I arrived at KBDR, a little after 20Z, it was obvious that my anticipated clearance over eastern Pennsylvania (via Sparta, Allentown, Lancaster, etc.) was a non-starter. I told Clearance Delivery that I was "unable" that routing due to extensive convective activity and asked for a route over Deer Park (DPK), thence JFK and Victor 16 over New Jersey down to the DC area. This time, New York Approach came back fairly quickly with a workable clearance: Vectors to DPK V16 ENO V268 SWANN BAL thence direct to KVKX. That was about as good as I was going to get.
I was already aware of a sizable patch of stormy weather churning around over Delaware and eastern Maryland and not moving too quickly. My working theory was that I could get started and head down there, get at least as far as southern New Jersey, and then work with ATC to work through that OR work around it OR land somewhere and wait it out. But the route across JFK and down through central NJ looked good so we got underway just about 2030Z.