Spoilers for me as well at least in terms of time/setlist. I'm not going to lie. I'm a "traffic beater". As soon as that last song starts, I'm starting to walk and then jog to get out of there. Call me crazy, but beating most people by even 5 minutes means I'm not stuck in the parking lot (or bus line in the case of Soldier Field).
Dude, I did this for Guns N Roses in Pittsburgh last year, and it was amazing. Every night, they closed with Paradise City, and as soon as the second verse started, I said goodbye to my friends, and peaced out. Absolutely zero crowd leaving, and by the time that I exited the stadium, there was a fireworks show which I could see fine enough from the outside.
Also, I NEVER pay for stadium parking. When I saw U2 in 2011 and The Rolling Stones in 2015, both in Heinz Field, I parked in downtown Pittsburgh, and then took the subway. After the show, we just walked. With GnR, I parked on the same side of the river, but about a mile away, so only about a 20 minute walk.
I was driving for Uber and Lyft when I saw GnR, so it was perfect for me, as I was then able to go straight to work, driving drunk fans home, making bank.