Thanks Thomas. Advice from the masters...man, I love this place!
As an aside, it is quite strange to me...the way these beautiful, young women obsess about the most trivial things. I was drawn to this particular young lady's coloring - specifically her hair and eyes. She has very light red (stawberry blonde?) hair, almost golden-green eyes and very fair skin. Fascinating. I think it shows even in B&W.
You can use "Short Light" or any other lighting technique with available light.
It is not necessary to bring in a bunch of light and reflectors, use what is available at the location!
There is so much to learn. I confess, I am a complete novice when it comes to lighting. I usually try to use shade or heavy overcast conditions when photographing people out-of-doors. Sometimes, I'll do the "north facing window with a reflector oposite" trick. I have hungrily read your descriptions of how to set up studio lighting in past posts (despite the fact that I have no studio and certainly have not a scrap of studio lighting). The trick with the string was a great idea - and apparently one that "every pro" knows but, it was a revelation to me all the same. Can you recommend a good book or other place to learn more about the art of lighting?
Hunter and Fuqua, Light: Science and Magic
Unlike most who have wieghed in, I am a complete amateur and pretty green:(. But one trick that has worked for me (although I realize it has many limitations) is to use the model's hands. Get her to rest her face on them, or pull a collar of a garment around her. I don't know if this will work for what you have envisioned, but I have had some pretty good results with this, especially with self-conscious people and people who are... uhm... on the heavier side.
Just a side note: Charis Wilson was one of E. Weston's models (and wife).
One of his more famous nude photos of her has been one of my own personal favorites and inspiration (I'm going to attempt to attach it here). In her autobiography she mentions her first reaction to seeing it was that it was awful because of the bobby pin showing in her hair. Something I (and I'm guessing many others) never even noticed.