Dream feeding

Julia • Kiwi girl, Kindergarten Teacher and Aunty to one beautiful nephew. Expecting our first little one January 2015
Hi there,
So my little one (6weeks) mostly sleeps from about 830-330 with no wake up, which is great but we struggle to get her back down after the 2-3am feed. Someone  suggested dream feeding. I'm scared it'll wake her up and I'll be up from 11pm
Have any of you tried this? Will it make a difference? How do I do it correctly with out waking her?