Exclusively pumping??

Adina • I`m 24 with a 2 year old boy and another on the way. Married for 3 yrs.
Are any of you mommies goin to only pump & put it in a bottle for baby? If so, what's your routine? How do you ensure that you'll have enough for the next feeding? What about when baby goes to visit family members? How much would you pump & do you just freeze it and take the frozen bags to wherever the baby is going? What about when you're in public?