Can you prove that, or are you just assuming?
Unless you can get the TX Chairman of Gore’s campaign in 1988 to prove he somehow switched over and voted for Bush (nevermind Reagan previously !), you know how he voted as an elected Democrat officeholder. As for Slick Willard, he PUBLICLY stated he was “NEVER” for Reagan-Bush, and as I stated, I don’t believe he has ever voted Republican unless it was for his name.
It is a safe assumption that Perry voted for his party in 1980 as he had in 1976, and when you realize that Perry was running for office in 1984 and that in 1988, he sought out the position of Campaign Chairman for Al Gore against HW Bush, then yes, Perry was just a normal democrat official, and activist, voting for his party.