After looking at the gunshow calendar for 2013, it looks like there is one every month. For instance, Rocky Mountain is Jan 5/6. Then Crossroads is Feb 5/6. Whenever there is a Crossroads show, the Rocky Mountain is scheduled one month earlier.
In 2012, it seemed like Rocky Mountain scheduled theirs 2-3 weeks prior to Crossroads.
Is it worth going to the Rocky Mountain show? From what I hear, it is half the size of Crossroads.