You're a chancer! Getting in to Beaulieu, on a Friday is like been given a map to the location of the Holy grail, the general way to do it is to take stuff and set-up a stall, so that you can then get a Traders pass to see all the juicy stuff, before the hoi-polloi get access on Saturday morning, but you will probably know this already.
Last year , (I went in Spring and Autumn), I noticed shed loads of stuff bought by Traders, stacked behind stalls with not for sale on it, such is life, me & a mate have considered taking stuff just to get access, but it will be next year before this happens,as we are not organised enough @ this moment in time.
Anyhow best of luck, it indeed would be a feat of some magnitude, if you manage it!
Cheers
JBWe