Well I went to the 'show' as a normal person, took the Beemer as the Audi failed MOT.
My observations:
There was:
A ton of Tee tees - TT owners group there.
A bunch of A2's - A2 owners group there.
Some UR quattros - some more genuine than others

Audi Q series cars scattered about
A few R8's V8 and V10 which some of the 'boys' loved revving the nuts out of (thought they were scooby owners)
Most interesting?:
1974 NSU Ro 80 with rotary engine had a lot of interest with a small group of Audi 100's from the same era
Nogaro Blue Audi S4
Pink (factory ordered) A3/S3 - Just mad but fun.
Audi Q7 for all the wrong reasons
And any A8's? Well I spotted two. One a slammed A8, debadged, W reg (I think), black(ish) non sport with a note on the screen apologising about the state of the alloys. One a silver PF A8 with an S8 numberplate. That was it unless there were more sneaking around.
All in all, as my daughter put it, it was pretty 'meh'. But it was a cheap way to visit the motor museum without paying full price.