I would question a doctor who insists that a vax must be given at a particular time. There is never harm in delaying a vaccine (except the possible risk that the baby will be more likely to get the disease in the meantime, which I personally question), but once a vaccine is given, it can never be taken away. Trust me, if she doesn't give it on schedule, the md will be all too happy to administer it at any later date.
(In case you hadn't guessed, we do not vaccinate in our house, and we have very healthy children who rarely get sick, and get over it fast when they do.)
Mothering.com has a discussion board with an extensive forum on vaccinating. There is a huge amount of information there, with articles, links, and a large community of moms who are very supportive of people who choose not to vaccinate.