Dee Dee,
On that first one, Hallie is saying "Yikes, mom, your stobes are a little too high!!!"
As for the wrinkles, that's so much a personal preference. I love unstructured wrinkles in my backdrops because it gives even more softness to it visually. In fact, I often hang them with large folds to focus on the subject in front. That's why I use muslin because they're light, can be bunched into a ball and carried anywhere easily.
In the studio, I've used canvass attached to a pulley system so that the backdrops were always hanging and I could just pull the one I wanted into the scene. That's the only way I've found to keep them from getting wrinkles.
When you use the hairlight, you need to make sure the front illumination is adequate so that the hairlight doesn't overpower the subject. It's only supposed to accent the hair; not backlight the subject.
Isn't it great having your own model to try things out? All my guys are great at holding a pose but my favorite guy, Rowdy, will do whatever I ask him to do so he's the one I take to shows to test out my lighting. You should see the look on people's faces when I stack him on the podium, tell him to "stay" and walk back to the camera and take a bunch of frames. Sometimes, I just toss a toy and he'll come up into a classic pose. I'm not sure why, but there's something about a 125 lb male Rottie standing without a handler that makes people nervous LOL.
Hallie is a great model! Very expressive. That's fun.
Keep experimenting until you get the look you like.
Jim