In most border towns if you take care of what you want in the daytime hours, it is pretty safe. It's when the night hours come and the vultures come out, and you hang around in bars, and drinking secenerios... that it begins to get chancy.
Of course, the youth are not going down for the same items the Senior citizens are---- they are boozing..some are into drugs in the night hours....and therein lies the danger!!
When we were in Progresso, Mexico in December (down in the Valley of Texas) we saw armed military on every street corner and some of their Military trucks parked at intersections of town. This was in daytime hours. Some get a "wiggley feeling" at that sight--- but didn't bother me. I figure they are there for my protection and safety.
I just LOVE Mexico. Her people are so kind, helpful and giving. They also revere the elderly....and I am fast getting there! Grin.
Enjoy the day! I will!
Happy RVing!
Joella