Keep in mind that this choice will likely be the staging point for future missions. Parents is relatively out of the way unless you live at the CMC apartments. In addition to its less than central location, it is easily scouted from any direction, and most of its exits present ideal ambush locations.
Your thinking of either pritzlaff or the football stadium, parents is that giant field in the middle of cmc,just outside of the dinning hall, thats literaly 50 yards directly south of keck. Its almost completely open, so escaping from it isn't that bed, especially since you can fire from the field. the only downside is that it is an open field, so if ur there, the zombie can see everything ur doing. Also, for any mission involving the towers, having it as a safezone would be priceless.