The hidden chambers will play a role in the grand role play. They are not going to be a base of operations so much so your character can venture from them without consequence. 

Our character sheets will not be secret so much as halted. As we talk about what we did during the year removed I will give you a template to keep up that will help people keep track of what it is they have shared and what people know. This way it isn't just us sitting down and telling everyone everything they did right away.