i actually work for a CAMHS team at the moment doing their administration :P
it all depends on what tier you are referred into, and by the sounds of it it would be t2 with your issues. they basically need your parents and your permission to do anything, so you dont have to do anything you are not comfortable with.
they are here to help you just like anyone on these forums are, except they are more qualified and it definately helps if there is someone is there for you in person.
there is nothing you should worry about as they are all nice people (well my team is, and i hope yours is aswell). if you need any more information you can ask me
edit: if you engage well with your worker then its really likely to help solve your issues and its proven on the stats that i have to go through each day.
i have even asked a colleague to help council me with some of my own problems, they havent started yet but you can trust them to be supportive and confidential as it is their job and are passionate about helping people
maybe i will be doing your paperwork one day if you live near me hehe