"Aye, it be more of a non-recommended technique than a 'policy''. Three cars, mebbe. More'n that,  them traffic lights and things interfere, dun ye know...""

Following up on this promise to inquire, I spoke with a superbly capable Cub and Troop leader, on Saturday, an electrical engineer for a fortune 50 corporation. A sharp and impressive individual, calm, measured, and balanced in his reaction to everything. Because he is confident in his understanding of circumstances and ability to respond appropriately. A role model to though he is 20 years younger. Said he'd never heard of an anti convoy policy. This month's Round Table in my district (no reason given) has been cancelled, but I plan to attend the next in August and present a written questionnaire to determine the level of unit leader awareness of the anti-convoy policy. And so we shall see, and so I shall report.

Concur and withdraw my conclusion.  (Wish I could edit above, but so be it). As you noted, per Jeremy Castleberry, "the council offered to a a boys only also.. But the idea lacked interest from boys only troops." Therefore no argument can be made that this is a problem as the non-elected group chose not to have a like event. 

If you read the comments on the facebook site, the council did offer a boys-only version, but there was not enough interest.  If true, then there is no issue here, huh?

Iteration is the number of events occurring of the same type.  Normally one reviews what happens and make changes for the next event with an eye toward improving. I think you are creating a strawman.  The event doesn't address any of the concerns you bring up.  Frankly, it create more friction by identifying girls as special members rather than equal members.  If this was something like the Catholic Camporee in that it is hosted by the Catholic Committee on Scouting and the Knights of Columbus are cooking a dinner and a breakfast for the participants, but it is open to all Scouts, then I would have no issue.  If the girl troops want to host a camporee for all the Scouts in the council and staff the stations, cool, but I'm 90% sure that is not what is happening here.