A couple of points here:
That is only one issue and it is a legitimate one. There are many issues that I don't expect the general public to know nor at this point in the situation can I put out to the general population.
If you want public support on this (I assume that was why you went along with allowing your letter to be published) you need to be public about these issues. You can't try and rally people to your cause while at the same time telling them to mind their own business.
I don't see it at all as not allowing him to explore new friendships-I look at it as giving him the opportunity to strenghten his existing ones and I am sure he still doesn't know everyone at Westlake, even though they all may very well know who he is by the time we are done. Being in a LS classroom does not give him a lot of time to meet a lot of new friends-no matter where he is. That is a big part of the reason why it is so important to have him with the kids that he did sit side by side for most of elementary school. You would be amazed by what some of the students from Davis middle school have posted on our FB page. We have always felt so blessed by the way our community has embraced him.
What is going to happen after high school when all of his friends go away? They'll be going off to college, moving out of town for jobs and just be otherwise busy starting their own families and such. You've put your child into a position now where he's never had to make new friends and all of his old ones are mostly gone.
After high school I assume the goal is for him to be able to be self supporting and self sufficient. His school buddies are not going to be at whatever job he's holding. He's going to have to learn to make those new friends from scratch. I think you are denying him an excellent opportunity to learn how to do this while in a protected environment.
and finally:
I actually said that if they needed modifications and supports in place to make his placement work at his home school then do it.
I hate to be a jerk, but the schools are incredibly strapped for money right now. Accommodating your son is going to be expensive. They will probably have to hire extra personnel (even if it is "just" an aide) and upgrade their programs. To do that I'm sure you have to go through a big bureaucratic mess where people need to come in and evaluate what is already in place, evaluate your son to find out what is still needed, so on and so forth. It's not cheap.
Demanding that the school spend this money so that your one child is accommodated is unfair to all of the other kids who attend this school. The money to accomplish these changes doesn't come out of thin air. It has to be taken from currently existing services. Are you willing to take current services away from many children just so that your son can go to school with his friends? Or finance the changes yourself?
Now, if no other schools existed in the area that had the programs your son needs, I could really understand pushing this issue. But that isn't the case. There is a school that has a program that your son's advisors feel is best for him.
With regards to the bus ride, what is it about long trips your son doesn't deal well with? Could you put him on the bus with a book, game boy, one of those handheld dvd players? Something to occupy him for the ride?
I really do respect that you are fighting for your son. I just don't think that that this is the battle you should have chosen. Best of luck to you and your son.