Sounds pretty logical to me!! Ummmm let's see, didn't Vernon fire Red and Sonny while Elvis flew off to California?? Wouldn't it be possible he again left the dirty work for someone else to handle cause he didn't want to tell Red he wasn't invited??? Maybe Red had spoken ill of Elvis marrying Priscilla and it ticked him off???????????? If Elvis wanted Red there - HE WOULD HAVE BEEN THERE!!!
And, IMO, Elvis had no choice but to marry Priscilla at some point since her parents had LET HER MOVE IN WITH HIM YEARS BEFORE!!! If he had tried to back out it would have been all over for him and his career!!