The best advice above is to find a Dr. who will support you. I interviewed 3-4 doctors in my area before finding one that I felt comfortable with, one who I thought wouldn't rush to the knife as soon as something weird happened. Together, the Dr. and I made a birth plan he was comfortable with and that I guided. He wanted a few outs in case I started showing really scary signs, but I wanted to make sure he got my OK before doing anything. He was really good about it. In fact, during checkups leading up to the delivery, he's say things like, "If you go into labor, but find out that I'm not on call yet (he'd come if I called, but hospital policy is to have you checked by the guy who is on) try to do as much labor at home til I get there because so-in-so doesn't like VBACS and may advise you to give up." I was shocked but pleased to find out how on my side he was.
As for natural, well, I tried, but on the third day of labor (yes, started Sunday night, made it to a 1, Monday I made it to a 2, Tuesday a 5) I finally decided on an epidural so I could rest. It was a local one, that I could control via drip button, and I was fully aware of delivery, as I didn't re-dose myself before pushing, and I found the experience of delivery delightful (of course, that was mainly because that meant labor was over), but really, it was a good experience, and I believe a supportive Dr. was the key, and also having an open mind to some meds, even though I only used them for a little while, they helped me be more alert for delivery.

Anyhow, there's my book. Good luck!!! And go for it, it is SO worth it.