Depends on the culture of the legal department/ general counsel's office. Are you able to farm out a lot of work to outside counsel? You will likely have to be "on call" for your clients (the company) but you won't be burning the midnight oil writing any briefs. You can just get outside counsel to do it.
For me, there's virtually no face time requirement because none of my clients are in DC. Of course, I still have to work IN the office, but no one cares if I work from home here or there, or have to leave early.
But I do have to have my smartphone with me in case of emergencies.