Brother...she already knew you had guns in there.
You are about to get hit. Call the law and get some drive-by patrols going...and do everything else you can.
Good observation...
I agree that a security camera would be a good investment. I added one to our home and its hooked to a computer. It can be set up through the software to be motion activated recording, can have the video emailed anywhere, have it call numbers, sound an in home alarm, the options are numerous. For less than 800.00 you can have a CCTV DVR card, professional software and a couple of cameras. Another great thing about it is that you or the kids can see what made that strange noise outside after dark.
PM me if you want info, I did alot of research before I purchased my system.