I just want to recommend ATE Superweeks www.ate.org.uk on this thread as well, as a brilliant holiday. My 10 year old daughter can't wait to go for the third year, on her own again. Her friends also go on separate Superweeks - its much more fun to go alone and really good for making friends and confidence building. ATE is an educational trust and it gives fantastic residential training to the monitors. I do think it can be difficult sending your children away to summer camp (the French have been doing it for years), but I know this is a really good organisation, and we combine it with a long family holiday as well.
Its also a good chance for younger siblings to have a bit of attention.
Anyone remember Colony Holidays??
I loved them as a child in the 1970s. Its now turned into ATE and Chris Green is still involved.Have a look at the website.....