Lot 12 is a living hell post game. Even if you try to leave in 3rd quarter it can be hours to get out. I will never ever ever park in that lot as long as I live.
I prefer lot 22, easy in easy out onto Fox Hollow. Once on Fox Hollow traffic flows nicely(unlike Park Avenue). 22 is an easy walk to the stadium but on gravel road to Ag Arena and then across Park. Fairly flat walk.
38 and 39 you are sort of forces out onto Park Ave to go East. I have never parked in those lots but have been in ORV and Lot 37 and always see Park Ave backed up but I think it flows better then being forced to go West on Park Ave to Atherton. However, Lot 37 I was able to use Orchard to go out to Fox Hollow which gets me out of traffic quicker. To me, these are easy walks to the stadium on gravel roads to the Ag Center. Fairly flat walk.