Will the bad news change my plan travel to Mexico?

Border towns can be sketchy but even then, not all of them are. Besides, the caravan owners are very, very careful and very knowledgeable. They know the scoop on what to avoid and where is safe. And it's not like they are strangers there either. . .they know many Mexicans and the rules. You're in good hands. Enjoy the trip of a lifetime and don't worry about what the zenophobes on rv.net say.