We had Kaiser until very recently. We vaxed our first kid, decided to delay and then vax selectively with #2 (but have only given him one shot in nearly two years as it turns out...) Anyway, we didn't have any problems. It's a big system with a lot of doctors, and I'm sure you will find one who will respect your position. All the docs I saw were very open to delaying although every one of them urged me to at least get him the DTaP (which I did not). I think that as long as the doc knows that you have done your research, that you can tell them exactly what your decision is based on, you won't have any problems. I really liked being on Kaiser, by the way, had a fabulous midwife with them, and was sorry to leave.