The renovated stadium and new football training center are beautiful - the game currently being played inside the stadium, not so much...
I believe the Cooper Drive tailgating area is first-come, first serve. As long as the weather is nice (it's supposed to be), there will be tons more people tailgating than actually go into the game so you'll need to stake your claim to a spot on Cooper as early as possible. However, given the current mood around UK football, you should be able to buy a parking pass from one of the "needs tickets" guys at a reasonable price. All of the parking pass required lots are nice and w/in easy walking distance of the stadium.
Also, here's a link to the "official" Gameday info put out by UK:
http://ukathleticsgameday.com/football/
Safe travels.