Lovely article by Callie Golba about pumping while doing wildlife ecology fieldwork in swampy conditions. Includes advice about things to consider, great anecdotes.
Some gems from the article:
"I was only in my first trimester during the previous (re)productive field season, so the only thing that changed was my morning sickness. I would just pretend I was searching for a turtle while I discreetly threw-up into the marsh."
"there are a ton of other considerations when pumping in the field. Can I pump in a stand of cattails next to my turtle traps? How long will my milk stay fresh in my wader pocket?"