Having just read 1 Nephi 17:2-3, I realize that even though the Book of Mormon is written from men's perspectives, these verses show Young Women's progress.
The daughters of Ishmael were probably all between the ages of 12 and 25 when they left their cushy home in Jerusalem. I bet they had never camped or journeyed much. They trusted and followed their father into the wilderness. They get married off to a set of brothers, not all of them thoughtful and patient, but young and impertinent as young males tend to be. We do not know how much was love and how much they just did as expected. But then they lose the one male they trusted thoroughly, their father and they "did mourn exceedingly" (v 16:35), now they get to rely on the young man they married for all their support and protection, and maybe their old father-in-law Lehi, who they or may not have much connection with. But they get through their mourning, and the next thing we know, not only are the traveling, but they are doing it well being pregnant and new mothers.
That transition from murmuring to motherhood, from fragile femininity to strength to care for our children in any circumstance, is one we all must go through in life. How great this transition is Nephi calls it a blessing (thinking the raw food diet was tough, when it was probably more healthy than they ate in Jerusalem). And then how this diet and daily activity level gave the women strength like the men.
I am sure the women found ways to do all the daily chores in the wilderness while traveling, and that alone helped quiet their murmuring, but so does the magic of holding your baby while he softly sleeps on your chest. That transition to motherhood, called "matrescence", is a powerful thing, involving much bio-psychology and physiology, and has a spiritual dimension that we only began to understand in hindsight.
It is no wonder Nephi doesn't talk much about it, as he couldn't, having not experienced it, and his wife, most likely left uneducated in reading and writing, was too busy taking care of the children and household, couldn't take time to write to us about her experience. Which is too bad, more women's voices are needed in the gospel.
