I've travelled back and forth to family in WV with some guns, as we go to the range when i'm in town. I have stopped to feed the kids and such, so I can't see how anyone would interpret the law as literally meaning NO STOPS. some are unavoidable. I have stopped at stores and such to/from a range, too, knowing that it was possible that if anyone found out I could be hip deep in manure. Still, I can't see how stopping for gas or a gallon of milk is that big a deal. that said, i'd never have a gun or ammo w/in easy reach and i'd for darn sure never try wearing one loaded, unloaded, in any manner at all without a carry permit and a lawyer to interpret all the restrictions on it. I have no respect for the gun laws in Maryland, but I certainly have great amounts of fear.
The answer boils down to two things: Common sense (you) and nonsense (MD).