At Frederick, MD and asked by Ground to please "taxi, take-off and depart" as a formation" which was not our plan, but we did it. Made sense as the airport was crazy busy and he was trying to minimize radio chatter.
Then got a 5 turn clearance which included crossing an active runway with a FIVE ship formation.
Sure glad I had the iFly geo-referenced airport diagram! Saved me again! Thanks iFly!
Mike in Carlisle