This. I grew up in a devoutly Catholic household, in a devoutly Catholic society, and we celebrated Halloween — going around the houses for sweets (though not yet called trick or treating, and doing some form of party piece obligatory), making masks at (convent) school , spooky costumes, ghost stories, spooky films, apple-bobbing and games etc. All Saints Day and All Souls, and November being the month of the holy souls were very important. Not seen as in the least incompatible.
I only came across the idea that some C of E strands strongly disapprove of Halloween when I lived in a village in England with an evangelical vicar, hence school ignored Halloween and the vicar (a creationist and Biblical literalist) used to come in and preach against it. (Which everyone then ignored. Actually some of the nicest times we had in that village were the Hallowe’ens when lots of people decorated their houses, the smallies were toddling about in pumpkin costumes before it got too dark, the shop, pub and PO all did games and decorations etc.)
It strikes me as coming from the same school of Christian joylessness as people anxious to tell their children it’s not ok to get excited about Father Christmas, presents and fun, it’s all about the Baby Jesus.