Well, not exactly.
The Catholics who live in Las Vegas do get married there, you know. They get married in the Catholic Church. The LV cathedral has instructions on how to be married in the Catholic form in LV.
lasvegas-diocese.org/parishes_guardian_angel.html
I think viewing marriage in this way and attempting a second “marriage” in LV
could bring into doubt the validity of the Catholic marriage. What you
seem to be describing is an attempt to marry secretly and conceal the fact you married in the Catholic Church while pretending the big bash LV civil marriage is the real marriage. That, to me, has tribunal written all over it.
It certainly isn’t something I’d try based on opinions on an internet forum with statements like “long story” and “don’t ask” in the mix. First, people on here, me included, are not professionals with a couple of exceptions an secondly, you have (for whatever reason) concealed the “whole story” which could drastically change peoples’ replies. This is something I would talk about with my priest extensively befor attempting.
There is something big missing from this story.