I didn't go this past year to
Disneyland I believe they moved it to both parks if I am not mistaken but not 100 percent sure. Maybe they just let you into both parks with the ticket.
Hi! We did DL Halloween last year (2017). There was no Halloween Party in DCA. Changes to the park for the Halloween time period were:
- projection overlays (Oogie Boogie at the park entrance, bats projected on Carthay Circle Restaurant)
- several nice decorations in Carsland
- a special overlay at the new Guardians of the Galaxy ride making it Guardians of the Galaxy Monsters After Dark.
- food options were added to various menus through out the park - our favorite being the Pan de la Muerto at the CoCo section.
However, the park was not part of a hard ticket event, there were no costumes for guests, no special shows, no special fireworks, and no trick'or'treating. Basically, as a perk you could enjoy some time at DCA with your party ticket. We got over there to use a fast pass for GotG:After Dark, but the crowds were huge - probably because locals could get into DCA with their regular season passes.
I adore DL, but loathe the Haunted Mansion Holiday overlay. It pushes Christmas into my Halloween season too early, something I can only tolerate that once every few years.