A large college campus is a destination in and of itself. The Rent is located on a former airstrip with no other reason for being there other than the game. My point was, friends, family and alumni would have an interest in being on campus after a game for hundreds of reasons, including visiting people they know attending the school, going to the bookstore, checking out the many new buildings, Ted's, etc. If you go to a Penn State game, you will find the fraternity houses packed with students and alumni. No hurry to leave campus. The Rent, people just want to get out of there fast.
So you're saying that 25,000 people will descend on the bookstore and tour the Chem building after every game?
I spent the better part of four years in Storrs and, not counting Christmas gifts for my parents during my freshman year, the amount of apparel I purchased at the Co-op amounted to exactly one polo shirt, a sweat shirt and two T-shirts. Whatever apparel I've purchased since '99 has been either on-line, Bobs' Store, or Bed, Bath & Beyond, where the price is dramatically reduced from the Co-op. I will give credence to this idea for one game day, probably every two years, but your idea of 25,000 alumni moseying about Crystal Lake 6-7 weekends in the fall, feeding the Canada geese is ludicrous. I'm 37 years old. Who the hell want's to see me in X-lot or at Teds?
People leave the parking lot at Rentschler for a number of reasons and none of them change with an on-campus stadium.
1) First and foremost is that security does not adhere to their own rules. They start kicking fans out before the 2 hour timeline.
2) It's not difficult to get out of the parking lot.
3) People don't necessarily plan for the after game tailgate.
4) Because of reason 2 and 3, it's easy to grab a table at Margarita's for a bite to eat and watch whatever big game is on at 3:30.
5) Finally, I for one would like to see my kid(s) before they go to bed and help out my wife after leaving them all home all day.
Putting a stadium on campus won't change that desire (or order) any and only serves to add another 1/2 hour to both commutes. If anything needs to change, it's student transportation. They need to add buses and give students more options for arrival and departure.