When I left my abusive ex, I left when he was at work. I took my things that were personal belongings like clothing and stuff I brought with me, and I disappeared.
Good luck. Sounds really tricky. I agree with atalose, maybe get a DV counselor involved with some more planning first. Who is going to be expected to leave? How will that look? How are you going to navigate if he is in control of your work life too? Do you have money should he get you fired or make your work too miserable for you to be there?