For me that's not Evangelization, that's going half way with bad. We can think that we try to take something good out of bad but on the end of the day we taking part in pagan culture.
On the end of the day children will say, well we been doing exactly the same what others we just did ware Saint outfit.

Have children dress as saints, put out a skeleton by the candy bowl with a reminder “memento Mori” and wishing a happy All Hallows’ Eve. Evangelize.

Halloween is what the good Bishop says in the above quote. Forget the fun, and pray to those who have gone before us and are in the beatific vision that we become what the Father has created us to be.

Halloween is "we poke fun at death, carving pumpkins, praying trick or treat, telling ghost stories."