Indiana (at least used to) allows you to drink and drive... meaning you can drive around drinking a beer... as long as your under the legal limit... which, of course, you SHOULD be able to do...
Same thing should hold for carry... if you can responsibly/legally drive a vehicle, you should be able to responsibly/legally keep your carry piece on you. Not like you're going to have a "hey y'all watch this" moment when you're not drunk. (most of us wouldn't REGARDLESS but I digresss)