Keeping up supply while traveling without LO

Gastro

In addition to solids LO still nurses on demand and does so about 5x from both breasts in 24 hours.

I will pump (using my hand pump) and dump to keep up supply (traveling internationally so logistically will be a pain to try and keep the milk). I plan to pump roughly around the same time he usually nurses. Unfortunately these days I can't get much milk from pumping. As long as I pump as much as I can at least 5x a day will that be enough to keep up supply? Is there anything else I should do?

I will be away for three full days.