Stuff stolen from your car

Some years ago I had a 9.5-foot cabover camper that I kept in a locked storage yard in an industrial area. I spent the Saturday of the weekend before going on vacation installing 4 brand new hydraulic jacks on it so it would be easier to load/unload on my truck.
Went down early Sunday morning to load the camper on my truck and the jacks were gone! Obviously someone had seen me installing them the day before. They also broke into the camper and took the extra sleeping bags and all my fishing gear I stored in it. Sure put a bummer on the start of the vacation even though my insurance covered all of it.
Also had the underdash tape players stolen out of my old '69 Swinger 340 twice back in the day. I was at work the last ime and heard the glass shatter, but they were gone by the time I got to the car.