I feel I've lost all sense of normality 
DS is 8yo, year 4.
I had to fight for the referral, school felt EP not right as even though he's on SA thats for literacy problems and his main ones are social.
They suggested get GP to refer as may be quicker, GP referred to Community Developmental pead, they turned down referral and so GP referred to Camhs. They also refused referral and were just about to refer back to GP for the EP when I spoke to them. (Yes, sadly you do need to fight).
I said I knew EP wasn't the correct service (questioned why and I explained it wasn't a school issue and I work in education so know EP role). I was told to email her (the receptionist) said she'd get clinician to look at it and review.
Get the feeling they were trying to placate me - however the clinician looked at my brief email, accepted referral immediately and have given us an appointment in 10 weeks. 
Now, what I'm struggling with is things that many children may struggle with, behaviours other DC's may show etc that do show DS's social anxieties, but that may be developmental. I don't want to go in with an exaggerated looking list that makes them think I'm a loon.
For example:
DS never really had an afternoon nap from a young age - about 15 months. He just could not relax into a nap, especially when there was noise outside/ within nursery etc. He did however sleep well at night. He would sleep during the day if he was still (not much!) and just dropped off. Usually any daytime napping was done in car/pushchair - once asleep he would be for up to 4 hours! During his toddler years I use to describe him as 'tazmanian devil on speed!'
DS would point blank refuse to sit within a group on the carpet, in the hall. He would be quite forceful and argumentative 
about not coming closer to the group. The more his teacher tried to 'encourage him to sit in the middle' the more he'd misbehave.
DS did not, and still cannot really walk along a road. He has to be a train, car, lorry, make all the noises, be 2 steps ahead or behind you. Just walking, calmly, talking is beyond him. He will now hold my hand for short periods before he's jiggering around and making noises. The same with sitting still - he just cannot sit still in silence. He's never been naughty and won't run off, but constantly needs to be reminded to walk iyswim?
His social difficulties are easy to explain - no empathy, lack of ability to communicate through simple 2 way conversation, very organised in play - cannot just play tag, throw a ball without exhausting all the rules and possible variations of the rules and what to do in that circumstance. Quite often doesn't say anything if he cannot answer a question, cannot start a conversation unless it's about minecraft! and very much imitates his peers behaviour and what they say. Doesn't really get humour and if he finds something funny, or more if someone laughs at something he does he repeats it until its no longer funny - and can't understand why its no longer amusing. Meddles continuosly in what other children are doing in an attempt to make friends/ join in. Doesn't pick up on the fact he's annoying them, they aren't responding to him etc. There's been a few incidents lately where DS has bitten children. Violence is just not like him and because he's struggling so much socially he now has a seperate break with a chosen buddy in the courtyard or library.
So what should I be listing for Camhs? Is it a list of milstones DS reached early/late? (walked early/ spoke late) or is it actually things I think show what his difficulties are?
Will they ask me specific questions based on the information I emailed? I get the feeling I get 1 shot at outlining my case and getting support for DS and as he's getting more and more anxious, tearful and generally not sleeping as well I know I HAVE to get it right.
Any support, advice, information will be most grateful right now. You'd thinking finally getting a referral I'd be releived but I just feel more lost. 