aria+dean+sam
There are a lot of questions in there. I'll try to cover them all.
It's true that there are vampires and werewolves here. Others as well; three demons, a few magical types, a few different types of shapeshifters, and so on. There's a sort of peace treaty here between them and us, the hunters-- they don't hurt anyone, we won't bother them either. The best way to protect yourself is not to try to fight them, but to avoid any sort of confrontation, like you said. If you end up in trouble, you can call us. I can give you our phone numbers, and also, we have angels on our team who will hear you if you call their names-- easier than using the phone if you're really in trouble-- and they'll bring in the cavalry. Well, they are the cavalry, but they can get the rest of us to you pretty quick, too. You can also do the normal human thing and call the police-- one of our team is on their staff, her name's Jody Mills. She's likely pick up on it pretty quick and send it our way. The rest of law enforcement isn't really equipped to handle this kind of thing, though.
But it's smart to have a few things on your person anyway, to protect you. Vervain is a good one to have, for sure; from what I've heard, it'll protect you against compulsion, which is basically vampire mind control. Wolfsbane, I don't know. To tell you the truth, I haven't looked into the werewolves nearly as much as the vampires-- for one thing, because they're usually only a problem for a few days during the month, and the ones that are here seem to have good control over themselves. Most of them also seem to be close friends with humans, including a hunter from their universe. She's vouched for them, so they're not high on my list of concerns. I don't know whether wolfsbane would work against them. For the demons, salt and holy water are good things to have on hand-- to throw directly at them, or the salt can be used in circles or doorways to prevent them from crossing it to get to you-- and I made an audio file of an exorcism that you can put on your phones if you want it. If you're really worried, there are also sigils that can be drawn on different places in your house to keep them out. There are wards from my world for vampires and werewolves and more, too, but we haven't had the chance to test whether they work against the ones that are here.
If you have any other questions or need help, that's what we're here for.