Sorry, you question did not get answered yesterday. The number of people may change (even as of this morning!) Structure of the all-day session may depend on the session and the instructors. All information on the session may have been posted.
See this for updated schedule:
I believe I heard that everyone will have access to a power plug this year, so that should give you some idea.
Hope you learn a lot on your first session. Jump into the Visionary Bar to meet very experienced FileMaker Developers that will have answers to almost all your FileMaker questions