Why not drive straight through the Saint Street areas down Souvenir Gate if she wanted to avoid Congress? Why bike the extra half mile down St. Landry then bike in through darkened barns behind the Coliseum? Why go out of your way to take a scarier, longer path? There has to be a reason she took St. Landry other than that she wanted to catch Congress at the Cajundome because the shortest distance between those two points is directly through the Saint Street area down Souvenir Gate.
The Mel's Diner is a possibility. Maybe she had another friend in that area?
And the last camera shot made public was on the Governmental Bldg across from Circle K at St. Landry at University.