First there is a board and there are filekeepers who take care of your bookings.
We have week staff, that run the SISC events.
Then there is you.
You become a member if you make a booking at SISC. You, as a member, have a saying in the General Assembly, and if you attended at least 3 full weeks in a period of 5 years (one each year), you can vote during the General Assembly.
In short, this is how it works:
at the General Assembly, you appoint the board members and filekeepers;
board members appoint the week camp managers;
camp managers select their week staff members.