I just got into the 4th stage of vampirism and found i'm not welcome in the city's anymore.
So I need to feed on a sleeping npc to get back to the first stage of vampirism.

Today i've spend a lot of time finding someone who is asleep but i cant seem to find any sleeping npc.
They are all awake even in the middle of the night.

Does anyone know a good place to find sleeping npc's to feed on?
Maybe some place like the waterfront disctrict in oblivion where poor people where sleeping outsite (easy targets)

I tried Anises Cabin but the seems to neven sleep.

Look for inns, or homes in small towns like Ivarstead.

I tried the sleeping giant inn, in riverwood but the customers there attack me on sight.
I tried all other houses there but the people are not at home or not sleeping (at night)

what is the best time to find sleeping npc's?

Where are you located?
In Riverwood, Sven's mother usually sleeps most of the night.

I find the best time to find sleeping NPCs is the 3-5am hours(thats when I do most of my breaking and entree) now houses with kids well those are a crap shoot as those little buggers can pull all nighters

When I had stage 4 vampirism, everyone in Whiterun attacked me. I had a good half hour having fun slaying everyone. Then I reloaded the save back to stage 3 and fed.
I like to feed on Jarls. They always sleep at 8PM guaranteed.

The farms outside of Whiterun (Pelagia, Chillfurrow, Battle-Born) are good source of sleeping people at night.