My son went to our local Special education preschool. The bus would pick him up at his day care center, bring him to school and then bring him back. He loved it. He loved school and I loved the services and education they provided. The key is to be an active Mom. You know your child and you will know if anything is wrong. I quickly earned a reputation as an involved parent which (if the teachers are good) is quite welcomed. They also know not to mess with my kid. I can be your biggest ally or your worst nightmare - you pick.
This summer, my son attended a summer camp where they offer a free advocate for special needs children. This is my son's second summer with his advocate. She's quite intuitive and works beautifully with my son. Her boss was shadowing them one day and at the end of the day (strike one), my son had gymnastics (strike two). They were doing an obstacle course and he wanted to go over the obstacle that he was supposed to under. After 3 attempts to redirect, his advocate told him he was done (strike three). Insert typical meltdown. "I mad at you! I walk away!" complete with flailing hands. The boss felt that my 4 foot, 47 pound string bean of a child was a threat to the advocate. She came up from behind and put him into a restraint hold (pulling his arms across his chest like a straight jacket, holding him at the wrists). My son immediately began to cry and beg to be let go, that she was hurting him (my son doesn't experience pain often as he has a high threshold - the fact that he said she was hurting him kills me). When she finally let him go, he was a mess. The counselors were horrified - they had never seen my son cry. She had bruised my baby's wrist. My son (who has verbal apraxia and doesn't express himself well) didn't tell me. His advocate and counselors did. Needless to say, all hell broke loose and I was the devil. Not only did the camp know but I made sure the school where she's a teacher was aware (careful who you mess with, you don't know who they know!).
Point I'm making is, your child should go and you should make it known that you are an active parent. Make allies where ever you can as they will be your eyes and ears. Show the school that you don't expect them to do everything. Get additional services for your child outside of the school because it sends a message that you are serious about setting your child up for success and the teachers/therapists/administrators appreciate it.
I am assuming your child is non-verbal. If you can afford it - I recommend getting the IPad as it has communication software that will give your child a voice. Many schools are providing them to their students (to use in school only). An online friend of mine uses it with her daughter - you can see videos of how it works on her blog http://niederfamily.blogspot.com/.
Oh, and as far as the bus, my son adores it. Always has.