Hi Bonnie!
Yes, absolutely! Elsewhere is free for you to post in.
You'll find out your house & year on the first day of term (01 May 2012). This is the same for everyone, even if you are attending the summer camp. We do try to keep people as close to the years they requested as possible, though sometimes we can't give everyone exactly what they request. That should give you a rough idea of the year.
If you have anymore questions, please let us know!
- Anneka