Anoka claims to be the Halloween Capital of the world. They used to have a parade and it was quite a big deal when my kids were little (22+ years ago); maybe this website has some stuff you'd be interested in.
Anoka Halloween Home
There are a lot of different things to do for Halloween. The MOA advertises that it has the "world's largest indoor Trick or Treat" event starting at 5:30PM. There's the Fright Farm out in Maplewood and the Hayride of Horror down in Cottage Grove. There were a lot of corn mazes around the Cities the past couple of years, I haven't see n much about them this year however.
I think if you do a quick internet search you can find exactly what you're looking for.
Whatever you do, have fun --and be safe!
