During and after any emergency there might be a distinct shortage of indoor plumbing and porcelain. You can't hold it forever. Males have a distinct anatomical advantage in that we can pretty much unzip and let fly.

The ladies don't have it so easy. For them urination can be time consuming, unwieldy, possibly messy, and involves exposing tender areas to cold, wind, and such environment threats as thorns and poison ivy. This tends to make the females a little less enthusiastic about spending time in the woods and, possibly, a lot less happy while out there.

As Papa said: If momma ain't happy nobody's happy.

To help the ladies stay happy there are a couple of devices everyone should know about: The Freshette and The Lady-J.

http://www.freshette.com/

http://www.biorelief.com/store/Lady-J-Female-Adapter.html

Think of these as adapters. They allow a female to pee into a bottle, or over the side of a cliff or boat. She can even write her name in the snow. Doing it all without having to bare her behind and expose herself to frosty winds, prying eyes, or needle sharp thorns.

Talking to ladies that use one of these they love them. Laying in equipment for a group a few of these will endear you to the women folk. They make great, if a bit personal, gifts for the the women in your life.