I'm no pro (my lo is 6.5 weeks and we have lots of sleep/feed/burb issues) but here's my experience-
I asked my doctor and at a local BF clinic and both told me not to wake for feeds at night if she is sleeping (at 5 weeks or older) but both advised me that I could do a dream feed if I wanted. Day is different- don't let them sleep through a feed time. So, info I received was same as advice in the book.
I personally tried a dream feed 2 nights ago- she fed at 10pm and then fell asleep shortly after (usually will then sleep until 4 or 5am) so I BF here at 12am and she peacefully slept through the feed. Unfortunately she then needed a diaper change and woke in the middle of it. Crying and screaming from 12:30am until 1:30am and nothing would calm her more than 5 minutes at a time. So, for my fiesty spirited one that hates to be bothered in her dream sleep- no more dream feeds as she was doing fine without them. You could try it and see what results you get.