Hierarchical website with userdefined hierarchy

Hi,

I'm currently making a website for a sports club with Drupal 6.9. The club has several sports groups like Volleyball, Badminton, etc. and each one has its own little section.
But only users in certain roles shall be able to create or edit content in the corresponding section (e.g. users in the role volleyball-editor shall only be able to add content to the volleyball section).

Now I would like to have custom sub-hierarchies within the sections.

|-History
|-Gym
|-Sections
|--|-Volleyball
|--|--|-Timetable         }
|--|--|-Matches           } Userdefined hierarchy
|--|--|-Pictures          }
|--|-Badminton
|--|-Skiing

Editors may manage this sub-hierarchies.
So there is a static main hierarchy with several embedded sub-hierarchies.

So far, I have tried the Book module with the Book Access module, but that did not work properly.

Please tell me how to achieve this setup and which modules to use? Is this even possible?

Thank you,
Neodym