That place has had some good shows over the years, but what a nightmare getting in & out of there.
there are a couple of tricks (i say this as a local). I saw Rush there in 2015 and arrived a few minutes before the show started, it wasn't bad at all. Alternatively, take I-66 to Rt 29 south, make a u-turn as soon as you can and come back north, then R on Linton hall road, left on Limestone, R on Wellington, it will cut off the backup that occurs if you go North on 29 at I-66. Whatever you do, don't get off at 234 Bypass and try and come from the east toward JLL
Of course the best option, especially for Buffet, is to rent a bus.