Considering I do every hall and every aisle, twice, in one day, it is doable. I move fast and don't screw around. Wear good shoes.
No brown hall this year. Black hall has two layouts this year I think. I think it is S Gauge and an O Gauge group. FYI for those looking forward to October, the National Capital Trackers are planning a massive layout, approx. 120' long, several levels, 10 trains at once.