You could make it a "harvest party" or "fall Celebration" instead of "halloween"...yo u could focus on more of a fall theme rather than anything scary or halloween related, just to have respect for the JW family. I attend a Baptist church and they too are very anti-halloween. They don't frown on anyone who does take part (we do for fun! ) but they just don't take part in the scaryness of it , ghosts, goblins, skeletins and such! look up on internet, other ways to celebrate halloween for those whos religion doesn't allow.