I make copies of registration and insurance cards with the address removed to keep in the cars. When we’re home the cars are always parked in the garage. H’s car has “home” in his GPS (not mine) but we do have a keyless deadbolt between the garage and house. We don’t hide a key. I think he carries one, I don’t. We have seven doors to the outside (!) that we rekeyed to the same key when we moved in 25 years ago.* All are deadbolts, and the side garage door also has a lock on the doorknob.
*You’d think this would be a huge house. Really not, just a lot of french doors to the backyard and patios.