I haven't run with NASA at Rd. ATL for 5 years- but I believe Jim Pantas is still in charge and it was a silky smooth event. Nobody gives grief for no apparent reason. I did a nut&bolt on the car I was racing that weekend, in the shed, between sessions and had a group come through. There were no issues. They only use the scales and then roll the cars out of the shed to a staging area outside- so the big area under the roof stays open. I would think the only time that area might be congested is after a spec E30 or miata race for impound...

FWIW aligning the rear isn't too hard- though I might think that because I've done it so many times. But I use four jackstands and some thread to build a square box (two strings at the sides of the car parallel to the center line- compensate for track offset). With some sliders made with masonite sandwiching grease, you can jack the car up, make adjustments, sit it down on the sliders, center up and measure. That's a half hour job with a crew worst case.