As far as Leaves go, you can choose to live on or off base, provided you can secure housing off base. Other wise you have your on duty times where you do your assigned tasks/job, and off duty times when you are free to leave the base as long as you return by a certain time (depends on current state of affairs/readiness) and you have your weekends off to do as you please.

This all revolves around the current required state of readiness for deployment and your duty assignment/job.