Did you even read my post.
I said it's not realistic to police 5000 students.
I didn't make any comment your diagram or how big the space is.
It's not a good idea to corralle students into 1 area.
First of all, when the students were tailgating in the Blue lot there were never 5000 of them there, ever.
Second of all, assuming X = large number of students, fundamental crowd control dictates that you want them in a minimal number of individual venues. You can argue all you want, but it's Incident Management 101.