I'd always thought the same thing about using a poncho for both raingear and shelter - how do you get out?

Then a friend showed how men can solve that problem: a "pee" bottle - prefereably a different brand, color, and opening size from your water bottle. (For example, if Platypus is your water bottle, Nalgene or Gatorade would be your "pee" bottle.)

For women, the problem remains, as best as I can figure.

By the way, the Minimalist is a waterproof-breathable bag. I used it for a year, including summer - not really a great experience, due to heat buildup in Ohio valley humidity. Other than that, it worked really well, and I'd recommend it highly. Of course, once lightweight solo tents came out (first the Hubba, then a succession of lighter tents and the revolutionary Tarptents) - for about the same weight as a tarp and bivy, a solo tent is a much better option in both comfort and convenience.