We travel full time with our dog,she is a ridgeback and she only barks at people too close to the camper she doesn't know, or other dogs getting too close ( we have 2.5kids)
Most of, if not all of the yappie dogs we hear are those white fluffy things that owners have as a lap dog. Seems like they never get trained to do anything other than tricks.
Dogs need and quite enjoy knowing where they are in the pecking order. A disobedient dog is one of my hates whilst camping. Ours is great and soon let's the other dog know when it's breached the perimeter then old mate has a whinge our dog is snapping at his dog that's got its leg cocked on our car.....next time I will let the dog eat your snack sized dog.......lol.
That all sounds a bit harsh......but it's just how it looks to me. A dog is a dog no matter how big and they all need training to be controlled properly , just cos it's small doesn't mean it's controllable.