FWIW here's the main thread for the conversation on The Bradley Board (not that one )
http://www.pjstarforums.com/viewtopic.php?f=63&t=98716
Even when things were rolling during the Jim Les Glory Years, many of our non-conference games had paltry attendance downtown.
This would not likely be an exclusive move back to campus. It would likely be something like a 6 game thing on campus, with 10 downtown (primarily Valley games and maybe 1 or 2 higher profile non-conference games).
The people that wouldn't go to the RC games are the ones already not going to similar games at Carver.
So the attendance, parking and intersection things are all overblown.
Yes, there will be greater stress on the intersection, but that's still largely because people are ignorant toward better parking and efficient outlet options.