I was told about 1000 this morning and that they are expecting to sell around 300. Barnsley sold almost 1600 according to Plymouth box office.
Just going on the usual away allocations, like this one on Watford's site. http://www.watfordfc.com/page/AwayDayGuides/0,,10400~1264852,00.html
I thought he was wrong because I`d seen the away guide or maybe they were expecting more going and trying to fit more in. Anyways should be plenty of room.