Maryland:
I am not from RGC, nor did I ever go to school there (this is kind of a friendly disclaimer, LOL). While in school at A&M, 87' to 91', I hung out with a bunch of guys from Starr county. They were absolutely some of the neatest guys I ever met. One of them is J.D. Salinas from La Jolla, who is now the County Clerk for Hidalgo county. Those guys really were like no others I had ever met. I went to HS in McAllen and was well versed in border culture, but the Starr county guys were something else.
Get this, about every 3 weeks one of their dads would pack a freezer up with meat (fajitas, mollejas, sirloin, ribeye, even tripas) and they would unplug it and drive to CS. Then he would pick up the empty and repeat the process. This happened very often. My roommate and I had a kegerator, so we would supply the beer and them the eats and it was off to the races. None of our grades were ever very good. Those guys BBQ'ed more than any human beings since the invention of the stove.
Back to RGC, I lived in RGC for about a year, and I love the people and all, but it sucked so I moved to Camargo for another year and a half (better places to eat, more things to do and surely much cheaper). I managed a plant over in Camargo for 7 years, so I know the area real well.
There is much to love about the area as it truly is unique. You mention grupos, how about Vayvien del Amor? I got to know them some.