You are split into groups and it's roughly by ability.
When they had their first session they were asked who could do certain skills - flic, upstart and so on and then they were grouped. Within each group there were girls who were stronger on individual things, but they seemed to work to their level and there were different coaches for each piece of equipment (the beam coach last year was pretty fierce by all accounts and I mean that in a scary way, not the current use!).
They also had to fill in a questionnaire when they arrived, saying what they hoped to work on and get out of the camp.
I can't remember exactly how long the sessions (parents were sent a timetable) were and dd doesn't remember, but we think about 3 hours in the morning and then a long break for lunch (time for a swim, eat, re-do hair, change leotard and rest up a bit) and then three hours in the afternoon and a break for tea, then a shorter evening session - but the exact timings are a bit hazy. Her memory's reasonable though, so it wont be far wrong.
The groups rotated around the pieces and she thinks there were five - beam, bars, floor, vault, dance. Each group got to do all of them every day so we think maybe 7.5 hours a day of actual gym.
If you contact them they can tell you, as they may have a different format this year.