Leaving stuff in a ute, and an unlocked shed? Mate, you're making it pretty easy/tempting for both passing and local scumbags!
Before spending money on cameras etc, I'd at least ensure that the shed is secure and can be locked.
I sometimes get scoffed at for putting the clublock on the car, shutting the gates every night, deadlocking the house when we go out... But like I say, I'd rather spend 30 seconds doing that, than 30 minutes on hold to the cops, insurance company etc.
See you tomorrow(?)
Tex