Access to Equipment

I'm not sure where to post this question so if it is not appropriate here please re-direct me.

Our club is in the early stages of a project to build a roll off roof at an out door ed center - one of the issues we are wrestling with is how to control, monitor, log access to the observatory and its equipment. With our unpredictable sky conditions we don't want to be too onerous yet we want to have a secure site.

Anyone have similar experience,

Thanks ...