How old is your baby?
We did this with dd & used to pick her up from around 6 months, feed & put her straight back down. At that age she didn't take in much air at the dream feed & any air she took, she could burp up herself at that age.
With ds, we wake him to feed at 10.30ish. So lights go on, nappy change, feed & burp. He still needs burping & as pp says - it just takes too long if he's properly asleep - or he hardly has any. In a couple of weeks we'll switch to a "true" dream feed. Oh & he always falls back asleep on the bottle, we turn the lights back out whilst we feed him.