Jenibrindle, if you do end up staying in tomorrow night, get one of those 'No Trick or Treaters please' signs for your front door.
You can get them from libraries. I got one last year and will be using it again tomorrow. It was very effective last year, most people respected it and did not knock on our door. We had 2 knocks, compared with about 50 the year before.
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Old aunts used to come up to me at weddings, poking me in the ribs, cackling and telling me
'You'll be next.' They stopped when I started doing the same to them at funerals.