We are doing AQA A - is that the same as you?
We did a 'mock' CA last Oct-Nov, and we're glad we did for our sake as it helped us get our heads round what would be required for the real thing (which we are doing at the mo) and raised some important issues. Even though we cut the mock timings by half, it was still quite a hard slog for the students, and as we're doing the real thing now we were only saying last week it seems like we've spent half the year doing some sort of CA! We prob won't do a mock next year...
Don't know what you mean by a 'booklet' - we produced a fieldwork booklet with data collection sheets etc in (no different from what we have always done) and students have been encouraged to collect their own data - some did so on the day, others have returned independently since. We have also issued each student with their own booklet in which they write ideas down, their research on key concepts, etc. We also produced advice sheets for the students on each section when we did the mock, and also produced powerpoints to help them with their Introduction, Methodology and Data Presentation... but that's it really!
As far as timing goes for the write-up, prepare for a shock - it takes ages. A typical 1 hour lesson, allowing time for log-in and log-out and a recap of what they've done and where they're heading, usually leaves about 40-45 mins max of actual CA logged time, sometimes less - considering they have 16 hours of this, we have about 22 lessons booked in the computer rooms...! My class has had 9 lessons so far, and we have averaged 38 mins of logged time per lesson!
Not sure if that helps?!