If I see any Halloween-themed/Samhain-themed BRS papes, I'll be sure to share them here. Don't wait with abated breath, though. I've never seen BRS Halloween art.>>2181307
It's important to remember that 4chan is anti-loli (anti-shota, too, of course) and leans more into the "art is not free speech, it's child abuse content". The background you posted, of the loli in a bed of leaves, may have been removed because of her inviting post (spreading her legs) or your post may have been removed for mentioning kids going trick-r-treating, or both. My post was also removed, although I didn't post content and I felt what I wrote was non-scandalous, non-controversial.
Anyway, tread carefully here. I would hate to see you get banned since you're being a valuable contributor. It's really rare (from what I've seen) for /w/ to get much loli content, so your contributions are especially welcome in that respect. I would recommend posting only SFW (non-suggestive/non-inviting) loli backgrounds here and then hosting the more risque ones at CatBox and simply linking that here.
If there is such a thing as an Edward Tivrusky ("Radical Ed" - from Cowboy Bebop) Halloween-themed background/wallpaper, that's something I'd be very interested in. Radical Edward may be my absolute favorite loli ever.