What are some of the main problems recording in this environment? How did you overcome them?
Working outside without a mains power source is always tricky, especially if you're a studio based producer used to having tons of choice in tone / colour of equipment. I am used to a certain quality of equipment that isn't always available when going off grid on location. Seeking out well made, robust, clean sounding, reliable recording equipment is essential for this type of work. Often if a device has a huge feature set, loads of i/o and runs of x2 AA batteries you've gotta think how can it maintain quality?! More dedicated streamlined equipment often gives much better results.
Keeping unwanted noise to a minimum is also essential. Imagine the artist at the peak of their emotional delivery and then a dog starts barking or a plane flies over; spell broken! Setting a relaxed slow tempo to the work seems to help here. Not being to precious or predetermined with the outcome. The best stuff is always unplanned anyhow, you have to embrace and trust in this when you are working outside of a controlled environment. Having rock solid equipment on hand lets you relax and focus on performances and the artists.