Thanks for all the responses. Yes, it would have been better to have the car doors locked. Usually we do, probably 1 in 30 chance they are unlocked.
I also agree with the choke point idea and better angles. I am going to get at least 2 new cams to get a better angle. It probably is some kind of tagging thing - last night, they hit all the houses on my street.
Based on the feedback - so far here's my list:
Go from 1 to 2 maybe 3 cameras.
Get better camera. I'm sure the hik can be tuned/improved, but I'm done with it.
Improve the sensor lighting, so that I can get decent lighting when triggered at night.
Look at angles - I don't have anything that catches the street.
Anything I've missed so far?