You have to read intent into the law. In your scenario, I contend that once the passenger had to move the car, then they would be in control of the vehicle (still legal unless they can't posess a firearm), but until that time, the driver/owner would still be in control of it per the MPA statute.
And, in the OP's case, I can bet you that any DPS trooper KNOWS that someone heading to a deer lease will have one or more firearms on them or in the vehicle. Unless they perceive a threat from the driver or other occupant, they should really care less about a firearm in the car. In this incident, that seems to be the case with this trooper and I applaud the fact she was good with us exercising our 2A rights.
