Plenty of serious Catholics keep their distance from Halloween, and they have good reasons. Walk down a seasonal aisle in October and the objection writes itself. Gore sold as decoration. The occult treated as a costume. Fear packaged as entertainment for children. A parent who looks at that and decides no is exercising judgment, not fear.
There is a second question underneath it, and it deserves a straight answer. You will hear that Halloween is a pagan festival the Church painted over: that the Celts kept October 31 as a night when the dead walked, and that All Saints' Day was moved to November 1 to cover it. That story gets repeated every October, and the historical record does not carry it. Halloween is Christian in origin, and specifically Catholic.
The evidence runs the other way. Christians were keeping a common feast for the martyrs by the fourth century. Pope Gregory III consecrated a chapel in St. Peter's to all the saints and fixed November 1 as its feast, and Pope Gregory IV then ordered the whole Church to keep it on that day. A vigil the evening before is simply what the Church does ahead of a great feast, the same way it keeps Christmas Eve. Samhain, the Irish festival the pagan story leans on, was an end-of-summer gathering in one country, and the medieval records give no evidence that it was a major festival across the Celtic world or that it carried any religious ceremony at all. No walking dead, no thinning veil, no Celtic New Year. Those details were supplied centuries later by folklorists, and most of the modern customs are younger than five hundred years.
Could some local folk custom have blended in along the way? Possibly, and there is no need to pretend otherwise. But even if it did, that would not make the night irredeemable. The Church has always been able to take what is good in a culture and point it at Christ, and a feast that belongs to the saints does not lose its meaning because someone once lit a bonfire in October. The pagan roots of Halloween are exaggerated at best. The Catholic roots are on the calendar.
So the question for a Catholic family is not really whether Halloween is allowed. It is what you do with the night you have been given. You can withdraw from it. You can go along with it. Or you can take it back.
That third option is the one "Reclaim All Hallows' Eve" prints in three words.