Well we don't know, I hope it's not 5, I think consensus is probably 4, I think FF might have went 3 and I really hope he did, but 4 is probaly the safest guess.
I am thinking along the same lines, as far as number of wolves. Hopefully only 3, but I've been listing my 4 scummiest since that is a good possibility. I doubt FF would have started with 5. That's too many and doesn't seem fair to the town.