I do not know the answer to your question.

But on December 26 I was supposed to pick up at DCA an SUV for my family's week long trip to Williamburg. The only car they had available remotely capable of holding 5 people was a RAm 4 pickup truck.

So I quickly booked an SUV at IAD, drive to IAD and switched the pickup truck for the last SUV on the lot. Slow start to our vacation but it worked out.