I don't think it's a choice issue if you look at the environment your child is going to be in. A few hundred kids in close quarters?? Flu shuts down several school systems a year. Insufficient vaccinations adds several more, and potentially worse, diseases in the mix. They don't have to vaccinate their kids if they are opposed, they just can't be in public school.
After working for a while at a company with a lot of international ties, I'm all about every vaccination I can get. We have people come in all the time who, just a few hours earlier, were in places the CDC is watching. They love going to Walmart, the mall, etc. so keep that in mind when you touch things in public.