By far the best especially in getting out after the game.Also, Fontaine Research Park. Free parking just off exit ramp to 29 and 64. Easy to get in/out and hit the interstate. Hiked it many times. about 3/4 of a mile from lot to stadium
FYI - Just saw on UVA website that part of U Hall parking lot won't be available due to construction from late Aug through late Sept.Park at the old U Hall in the west parking lot and walk a mile or so or take a cab from the street west of the U Hall parking lot. The cost of a cab to the stadium is less than $5 plus tip and the cabbies are always there trying to make an easy fare, but it's an easy walk straight down Alderman Road.
http://www.virginia.edu/parking/documents/maps/FootballParkingMap-Detail.pdf