My fella is a bit of a night owl too, fed 2 hourly last night but does better stretches during the day. We had some problems feeding in hospy, he was very sleepy but once they picked up the tongue tie and that was fixed it improved. I was topping him up with expressed milk each feed but he's not needing it now and much less painful to feed. I've just got to be on the lookout for mastitis as im prone to it.
I rekon feeding takes a good 6 weeks at least to get established.