Breastfeeding twins

This is my first set of twins and although I'm only 14w I really have my heart set on breastfeeding them since I did my now two year old until he was about 14 months and didn't use even a little formula, with him I had so much extra frozen milk we had to get a deep freezer for out meat and veggies lol but I'm wondering is it just as easy to store extra and feed twins so they get the right amount?