Jester, I always tell people to go into one of the original USA apartment complexes (North, South, West) and park in an empty spot there and walk the few minutes to the stadium. There always seems to be plenty of parking. Also, from 5th place to 3rd Street the side streets that run north-south (College, Evanston, Florence all seem to be used for game parking. I have never seen TU ticket in any of the apartment lots or the street. If people are getting ticketed/towed from the neighborhoods south of 11th/east of Harvard it's because someone in the neighborhood has filed a complaint. Last year, I parked in the lot adjacent to Case Tennis facility almost every game and that was arriving no more than an hour before kick. TU's security resources are tied up during games and they don't send someone around to lots looking for permits. The ones they block off (Mayo Village, behind Twin Towers, LaFortune) are lots they use for HDCP parking or don't want to allow people down 7th Street.
Seriously, USA North always has available space in it (corner of 3rd & Delaware). If you walk slow it's max 10 minutes to Chapman Commons. You're 3 minutes from a shuttle stop at 5th Pl behind BAH/Phillips halls.