Maybe you want to pack up everything that is MOST IMPORTANT/irreplaceable (photos, treasured belongings) and stash them at a friend's house. Don't forget important documents like insurance, deeds, wills, medical records, birth certificates, etc. That's what I did before I moved out. If you are worried about the cats, see if they can stay at a kennel or if you have a friend that could take them for a couple of weeks.
I wouldn't worry about the locks--he cannot lock you out and the police can make him let you in.