I hope it is not your first UT game day experience. A real game day is very different than Saturday. The Strip will be slow with everyone standing in line to get in the stadium for autographs. You will think the stadium will be overflowing when you see the lines, but once they open the gates and you get past the initial mad rush, traffic outside will be very light.
The autograph session is to me an embarrassment. My kids have been to 6 or 7 OW games now and I don't even try at this point. Grown men shoving through lines trying to get as many signatures as possible in one hour is something to be ashamed of (If I am talking about you, then sorry). The final straw for me was when my (at the time) 7 year old son fell down in the rush and I truly feared that we would be trampled.
My advice, let everyone run in, forget the autographs, walk around the field and take in the ambiance and then concentrate on watching specific areas of the game; defensive line, wide receivers, etc. If you try and take this as a real game, you will be disappointed.