I just called Bull Run. They don't have any tournaments scheduled for the 11th, so we should be good to go.
They do have a patterning area, but according to the guy I talked to, it's best to pattern on the weekdays. Weekends are busy and they often use the field for other activities.
BTW, if anyone has an extra shotgun, it might be nice to bring it along. I'm planning to rent a gun and it looks like a few others are as well, but they sometimes run low on rentals on busy days.