Zombies are cake work. Don't believe the movies, nothing is easier than hunting zombies. The things aren't exactly discreet, move at a glacial pace and are extremely flammable.
I use an M2A1-7 flamethrower for zombies. Gets the job done fast if you can handle the smell.
Vampires are an entirely different matter and not for the foolhardy, but even they have a plethora of weaknesses that I understand are easy to exploit when well prepared.