J.C.
I had a natural birth at Kaiser with my daughter and it went really well, better than I had hoped for. My advice would be to try and get a doula, we found one through our local birth center who had recently completed her training and needed to donate her time as a doula (she was amazing). Also, right a detailed birth plan, like what you do want and what you do not want to happen during the birth, remember to include what is ok in case of emergencies. Give a copy of the birth plan to everyone, your doula, people who are going to be in the room with you and the hospital staff/doctor. The other thing that was helpful for me was to take natural birth classes prior to the birth, then you and your partner know what to expect and how to give birth naturally. We also did these classes through our local birth center.
Also if you can have a nurse midwife at the birth that is great too!
Hope this information helps, and congratulations on your choice! I really think your baby will be so much happier and healthier without the drugs in it's newborn system!