I went last year and my memories are:
A 70 miles 2-hours+ drive to get there, including queueing at a junction with poorly sync'd traffic lights.
Having a pleasant chat with the Bright Onion folks (but they said they couldn't do the pedal I wanted).
A good chat with a chap on another stand who had restored some vintage amps.
Standing at a table wanting to ask something but the bloke there was just talking about himself, loudly and without pausing for breath, so I wandered off; I went back later and he was still at it, so I gave up.
Quite a small show for the asking price and not a lot there.
Going into Brighton after (haven't been for years), taking a stroll around the lanes, and having a rather expensive (but nice) meal.
I didn't bother this time 'round.