Wow. It's amazing what some people remember. My mom went to several display centers for both Kings Dominion and Busch Gardens. The only thing I have ever heard her mention about the Kings Dominion presentation was that among other Hana Barbera cartoons that were featured. All she remembers where The Banana Splits, because she didn't like them.
Just a side note: she was new to America at that time, so she had no connection to any of the Hanna-Barbera characters.