May need to aim 1 trailcam at the other to catch the thief.
I know that is two cameras that you risk losing but if he only messes with one of them then you should be able to catch him.

I had a lil buddy heater and a coat stolen from my tent oct 19th
it sucks when people mess with your stuff. Just replaced the heater to the tune of $95. Wish I had a trailcam pointed at the tent when that happened.
Goodluck