First come first serve and everyone waiting in the same line. It’s the fairest you can get.
It's also the hardest on ops. People attempting to camp/sleep overnight in the parking lot or showing up too early and traffic backed up on the roads.
Huge, wide crowds blocking security, entrance, walkways. People just wanting to go to DHS without bothering with the lines for SWL will also be frustrated.
Well, poor DL will be the test case.