As for how everyone knows each other, all of the hunters are in a 'hunter clan'. So, I'd suggest putting in how your hunter met James Matherson (the head hunter), such as going to Greyville, being raised there, knowing his father, or whatever, and how you joined the clan.
If you're a werewolf, then it'd be good if you put in how you joined the werewolf pack in Greyville, such as moving there or being born into it.
A human can oput if they know any of the werewolves, or possible hunters.
Just put these things at the bottom of your sheet that's in the characters tab.
Edited my cs :D