Exclusive pumping mummies out there?

Hi mummies! I have been exclusively pumping since my LO’s birth as he doesn’t latch well 🥲 can any mummies share their experiences when they’re going out for long hours? So far, what i did is to express right before i go out as the expressed milk can only last up to 4 hours. That means, i can only go out for a shortwhile. Do you ladies also bring your pump to pump outside? Cause as you know, we need to pump every 3-4hours or our milk supply will deplete.. so when i pump outside, can give to LO directly. I just find that it’s rather tiring but i would love to continue giving breastmilk to LO. 🥲#advicepls #firstbaby