sunny, and -23C. Dog walk will be short.
We are retired too, and our house is not visible from the road. So, impossible to tell if a vehicle is parked unless a person walks or drives down the driveway to check, in which case they may be seen. And since we are retired, it is impossible to predict when we are home.
As a result of these two factors, our house has never to my knowledge ever been bothered by anyone, and we never lock our doors unless we are leaving town. So far, so good. Friends of ours in town suffered several breakins in a row once the local thieves discovered his love for high end stereo equipment. After the third breakin, they gave up and moved. Location, location, location. They were employed, and the house could be watched. Easy peasy, low risk for smart thieves.