“hosting the Super Bowl in New Jersey will require extensive planning”
Because the stadium magically holds more people during the superbowl?
Because there are never any large events in the NY metro area?
The biggest issue for a "national interest" special event is that the vast majority of the attendees will be coming from out of the region -- and most of them have probably never been to the stadium at all. For a regular Sunday NFL crowd, there is a basic familiarity with the region, the highway operating conditions, parking locations, etc. For a Super Bowl, every attendee is going to have to be given explicit instructions for where to go, where to park, security requirements at the gate, what they can bring through the gate, etc.
Related to all this ... Keep in mind that for a regular NFL game, most of the attendees travel from home. For a Super Bowl, most attendees will be traveling from hotels -- and again, these are places where they've probably never stayed before.
A further complication is that most spectators will probably be forced to park far from the stadium and get bused to the game. I'm sure every on-site parking space will be reserved for players, media, league officials, VIPs, etc.