Like almost anything DALLAS related, there seems to be an awful lot of revisionist history when it comes to the actor's recollection of events. For instance, Larry Hagman on an episode of Larry King (video can be found on YouTube) with Linda said "we were always together"...Larry, Linda, Patrick, Victoria...and Charlene I believe was thrown in the mix as somewhat of an afterthought. A lot of early season pictures at events seem to prove that version too. Some might even say, they appeared a bit too cozy at times.
In recent years, we hear that Victoria never participated in the hanging out off set. Again, there seems to be lots of photos that would prove otherwise. We also hear the term, "three musketeers" thrown around the last few years and Patrick says that he, Larry and Linda would never make a DALLAS decision without each other's agreement. However, Larry and Patrick didn't mind when Linda was let go due to budget cuts. Budget cuts partly as a result of Larry and Patrick's huge salary increases...again, without caring about their female counterparts not getting equal pay or screen time.
So I would think it's safe to say that the DALLAS cast is pretty lucky that cell phones with camera and video capability, fed straight to the internet, weren't invented back then.