Apparently baby wipes are a good thing to add. Servicemen and women have been using them in Iraq. Something a bit bigger and more heavy duty than a moist handwipe.

If your mother still has her cycle, pack some menstrual pads rather than tampons. They are more versatile.

As for makeup, keep it to colored lip gloss or balm, since it moisterizes better. Perfume (if she can't live without it) in a tiny tube could be used as a fire starter, if need be. Lotion that has a sunscreen in it and that is unscented is best.

A "Clever Toothbrush," which has the toothpaste stored in the squeezable handle of the brush, would be a good idea.