If you need a philosophical exemption in your state, lobby at the state level, by contacting all the senators and representatives, preferably your own district representative first. Don't be afraid of their no's just keep plugging. Let the rejection serve as an inspiration to spur you on. I was told in no uncertain terms that she would not endorse a philosophical amendment to the bill she authored. She did however give me the impetus to go to the Public Health Committee and lobby them for help.
People fight harder when they are defensive.
Remember, the best defense is a good offense and that is what the government, health departments and pharmaceutical companies are doing now. When the NOW show broadcast a piece on vaccines, we got the local news to a piece on a woman here in town. Inform the local stations of the parent's group holding a meeting and who will be at the meeting. This might be especially useful if you have a medical person from either side addressing the group. Contact program managers of shows and ask for rebroadcasts of vaccine pieces.