When I am on the road, I will usually pack a few nuts with me, or some other LC snacks. When I eat meals, I basically say no to bread, sugar, rice etc. (and fruit for the most part), but everything else is legal. I wouldn't bother counting carbs either. It is best just to come up with a list of things you can eat, things you can eat a little of, and things you can't eat at all, and stick to that. It has worked for me.