Laura,
Are you a member of the yahoo vaccine group run by Sheri Naken? There are a ton of parents from across the U.S. who have experience with getting their unvaxed child into different schools. I wrote an exemption for my daughter(she was partially vaxed though- but they didn't know it at the time and it was a public school) and gave it to the school nurse in May before the start of school. I was never questioned.