[@HaltingBlooper]

If you want too but seeing as how the Gems know a good number of humans there is the off chance they aren't there at the Temple and are actually enjoying Halloween for themselves. It would also help take their minds off the sadness they have felt over Howlite. It is your call Halting. Everyone will work out there own things out and some could have decided not to particapate in Halloween or Blood could have caught them all before leaving.