I research more specifically these days, as my general reading on the period of the 1830s has given me a good groundwork. Generally, no, though it's frequently sparked plots for other books. You also credit the staff of the Laura Plantation in St. John Parish. I loved writing Harry as a character. It can't have been that different in the slave quarters, which seem to have been a mixture of minimum-security prison and African village.
People are people.
I have been particularly impressed with your account and description of Marie Leveau, especially compared to other contemporaneous historical record. Marie Leveau is another character I enjoy writing. She enters only peripherally into the next few books, but I'll certainly use her later. For one thing, KISS is about opera, which opens the door to much silliness by its very nature. Given the emotional blackmail January's mother practices on him, it's definitely a change for the better as far as he's concerned.