Both of our kids went to Butler and we were extremely happy with it. I have a friend that had one of their kids at Bay and one at Butler at the same time. It was based on the teacher for each child. I've known kids that go to Butler one year and Bay the next and then back to Butler. Again, it's all dependent on the teacher. You can't go wrong with either.
I'm surprised and disappointed to hear about Douglas' experience. My son has a friend that is slightly autistic and he was mainstreamed in with a class at Butler and did very well. That was a few years ago, so maybe it depends on who is in charge at the time.
I would go and talk to the principal and a few parents, tour the schools and figure out which one best suits your family. If you're going to be dependent on the bus for transportation, where you live will decide it for you