I haven't done it *yet* but I am planning to do it. We have our first Bradley class tonight! Have you read any books on natural childbirth? If not, that's where I'd suggest you start. Husband Coached Childbirth is pretty good. It is by Dr. Bradley. Basically, his philosophy is this: animals give birth without needing all these drugs, so why can't humans? There's no reason for humans to need drugs for a normal birth if they can learn how to imitate the animals, and all women can be taught to imitate the animals.
Also, I'd really suggest taking natural childbirth classes to learn the techniques and also for the moral support from those who are also going through what you're going through with the same goal in mind.
Finally, stop talking to others about it. People who naysay you are probably unhappy with some aspect of their own birth experience. Maybe they wanted to go natural, but gave in to the allure of drugs. Who knows? Or, if people bring it up, just use their naysaying to make you more determined. It pissed me off so much when women at work would tell me, "Oh, you'll love being pregnant solely for the epidural. It feels great." I'd say, "I don't plan to have one." Then they'd tell me, "Yeah right. I said that for about two minutes. Trust me...you'll be screaming for an epidural on the way to the hospital." Trust me...I don't plan to.