Sorry to hear that.
I have had my van cleaned out a few times during the day while on the job, it is a punch in the stomach when you see your stuff gone.
However I get to leave that behind at home.
Can you move?
Cameras IMO will only make you get out of bed more and check the monitor.
Sometimes a few miles makes a big difference, I leave my garage and truck unlocked in my driveway and sleep fine. Not more than 5 miles south of my home my van would be picked clean in no time.
My wife and I picked our home town primarily based on the schools and police dept. The local PD has a reputation for being effective.
Bob