Ftm & need advice on breast feeding?

When you mamas are out just to a family or friends house or anywhere.. and you have to breast feed your baby but you’re pumping.. do you bring a couple of storage bags filled with breast milk with you? Or do you just pump right there and then?

I’m just confused, I want to breast feed but pump my milk instead and use storage baggies.. is it okay to just bring the bags filled with milk and use them later? I’m just concerned because I know you can’t keep them out for so long if it’s not refrigerated.

What’s your plan when you’re a pumping mama and not home?

By the way I have no problem breast feeding on my breast, I would just like to know other ideas on what you do.