I also have a suggestion. Bring light weight black trash bags to put over empty seats nearby. They would double or triple the effect easily and for pennies.
Just my opinion. If I was going I'd take 50 bags to bag all the empty seats I could find.
As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron. -HL Mencken 1933