Some drive-ins actually set up their own displays. Over here, it's the opposite.
Several cities, and a couple of large businesses have some well-organized shows, which operate from barges out in the bay. People set up along the roads throughout the day... it's a huge party.
Unfortunately for me, the party is 5 miles from where my theatre is. An 800 car night will be reduced to 10, simply because of the holiday.
So... we don't open on that night, no matter what day it happens to be. After 22 years, it's a fact of life we've long since accepted.
Besides... it lets us go to the party, too!