Pumping one feed for over night?

Claire • Proud mummy to baby Girl ❤️
I've been breasyfeeding for 6 weeks now. My baby was only 6lb 6oz when born and has been eating little and often. (More or less every 2-3 hours) all day every day. 
I'm thinking of pumping one feed if milk got my husband to give for example at mind night then I can sleep from around ten til two hopefully. My baby sometimes takes a dummy. She has never tried a bottle. 
Has anyone had any sucess doing this or does anyone have any tips or tricks on pumping. ?? How many oz should I pump? How much breast milk does an 8lb six week old baby need per feed? Help please xx 🍼🙏🏼