When you are involved in wildlife conservation, you spend a lot of time traveling in undeveloped areas. That's sort of the point, right? Keep wild areas wild.
As a guy, I'm lucky that I can relieve myself pretty much anywhere there is a bit of privacy and not too much wind. But unfortunately the same cannot be said for my female cohorts.
Thankfully there are inexpensive and cheap solutions. I obviously don't have first-hand experience with any of these, so I encourage you to do your own research. However I generally trust Cool Tools, and they recommend the pStyle. This article in Backpacker recommends the Pibella first and SheWee second, with pStyle coming in third.