Looks fun. I don't have any experience with the Abraham Lincoln-verse you're using, but the description you've provided is adequate enough. Just one clarification: when you said that "when turning, they're in the most pain they've ever experienced", does that mean just as they change, or the whole time they're in vampire form?

Also, putting in my interest for an old vampire, a behind-the-scenes sort of advisor who tries to guide the younger ones onto the correct path of coexistence and keep them from going on killing sprees.