Advice as above, these sales really are a bit of a scrum! Think 'Monica in Friends,the one with the wedding dress!'
My top tip is check out the equipment first, and head over to the clothes later, there are in my exp fantastic bargains to be had at my last sale I picked up a pack of brand new tots bots washable nappies for £3.50!
And its def worth hanging around, as the sellers have to return to collect their money and stuff that has not sold, and as someone else mentioned they often drop the prices just so they dont have to take it home!
I was considering a vibrating baby chair and having put it down the seller came over and reduced the price from £10 to £3.00! Its practically new!
I would grab anything of interest and then decide as you can guaruntee that someone else will snap it up just as you decide you want it!
Take a (big) bag to hold things as you look, something like a laundry bag or similar size!
And rather than que for ages to pay, just keep browsing, you never know what you will find often things have been put down after someone has changed their minds!
Def take someone with you, its not for the faint hearted!
Our next one is Saturday, I have a huge bump now but wouldn't miss it, you will be amazed at the quality of stuff, good luck!