Sounds like a lot of BS to me. I don't have trunks to begin with. A locked box? Or just out of reach of the driver? And unloaded? --- The is no valid law that can require me to have a 'trunk'---- there must be more to this.?Last time I went to Maryland I checked and you can take a handgun, as long as it is kept, un-loaded in a locked box in the trunk of your car. You can have a loaded gun in your room.
I did not check on knife laws.