It is only for people onsite at certain hotels - Santa Fe, Cheyenne, Sequoia Lodge and I think Newport Bay.
It isnt always available and they only have so many slots but you need to ask at reception when you book in.
It always used to be in either Chalet des Marionettes or Bella Notte (you are told which one) but people have recently posted about it being at Plaza Gardens
We have done similar to previous poster and had a late breakfast after EMH