Sarah,
I'm thinking maybe the best way to go is to have the flag printed if we can allocate the money. Otherwise maybe the old fashioned way.
We are thinking something like this. Maybe sports will pitch in and buy some flags to help defray the setup costs.
Good point on the booth height. The top of our pit is at 9.5 feet, 1 half foot under the 10 foot limit, as seen in the 1st photo.
http://www.kellrobotics.org/index.php?option=com_content&task=view&id=68&Itemi d=1