Right, I'm an old hand now after almost a month here.
Bring an iron and an ironing board - the biggest and bestest you can. You'll be better off for it.
Bring a laptop - or if you know who will be in your division sort that out between yourselves. Hugely useful for presentations.
Your personal draw is big enough for a large 15" or small 17" laptop in addition to as much stuff as you actually need.
Don't be too worried about bringing extra stuff, it can live in the baggage store and you'll be able to get into that about as often as you need.