www.juneteenth.com is the most reliable source IMO for Juneteenth information. It would be a good time to honor familly young scholars, feature family members who have various talents ie music, singing, public speaking and also open your family reunion with a libation or prayer in remembrance of your family's ancestors. Perhaps have some of your elder members talk about their parents and origins.
Also a nice tour of Wiley College for some of your younger people may interest them in attending an HBCU.
Just random ideas, kind of... lol