Are you going to be the only one in the car with Mina? The one thing I worry about is the cat getting down around the driver's feet if she is out of the carrier. If you are the only one in the car . . . . . and she gets down there . . . .what will you do?

What about a cage instead of a carrier? Then she could see more of her surroundings. Don't know what sort of vehicle you drive.