HelenX,
Probably better to await the winter sale than brave the scrummage. I once went to Wragby for a summer sale and have never gone back again. Don't intend to, either.
Probably finish up with things you don't want/need and spend more than you wished - needs a strong will to avoid that (or go to the sale in one of those tiny boxes on 4 wheels!). Or arrive too late and find the thing you really wanted has sold out!
Making an on-line order for what you require and getting it in early for the winter sale is likely easier on the wallet, I reckon. Free delivery too, if over a hundred quid - and for you, it is hardly worth the trip (just for the sale) if you were planning on spending less!
Regards, RAB