Potty Training Tidbits

Potty Training... Does that send shivers up your spine (either ones of excitement or dread). It does mine. I love the idea of potty training a child because that means one less diaper to change and one less expense to purchase. But, I am not exactly thrilled about the process. I think that every child has a window that will open when they are ready to venture forth into the land of "big boys or girls." I also think that if you aren't active when that window opens, you may miss your chance at an "easy" process- if that word can even go with potty training.
I am currently working with Miss Magee. She has expressed interest in being a big girl and has reached the point to know when she has to go. We decided to reward her with M&Ms when she goes on the potty and still has a dry diaper. Well, after her going multiple times in one day and bouncing off the walls, I decided to start a sticker book. So, every time she goes she will either get an M&M or a sticker, but she never knows which one is coming.
So far, she has done really well for a child at 28 months. I am so happy that she has expressed interest in the summer as opposed to the winter simply because you can keep her in dresses which makes the process a tad bit "easier" (I still don't think easy really fits in this context, but for the sake of writing, it will have to do). I've helped potty train boys before, and I find them to be less hard simply because you can make it a little more fun (and they can go outside which makes it even more helpful...well, until they try exposing themselves in your neighbor's front lawn and then it gets complicated).
I've thought about letting her run around diaper-less. Any takes? Obviously, I am not a mom. I am simply a nanny with experience, but I am always open to new ideas or tricks that have worked along the way with others.
So, my question to you, my readers is this, Any tips on potty training a girl?
Shall I attempt to go diaper-less while at home or is it more of a hassle than a help?