I went on Sunday and now that you mention it..yes, it didnt seem like the 'ordinary' people who run the sale that were directing the traffic.
I witnessed myself a car driver having a go at the attendant at the very bottom of the field. They were sending people right down to the bottom when there were ample parking spaces at the top entrance as the 'early birds' had parked there..then left. Because they were sending people to the bottom, this resulted in a que. I myself was parked along the road for some way waiting, at a snails pace to get into the field. I suppose this was the reason? The bloke in the car certainly seemed to think their parking was causing gridlog out on the road.
Still...love this bootsale and its not till your legs are aching the next day that you realize just how far you walk!! Always pick up some good bargains!