This is almost entirely armchair a&d, but what if they had a two-park event where neither park fully closed?
Something like this:
View attachment 11193
While it takes the Sprungs, MiB Tent, and Parade Buildings Out of Play, it would still allow for some new locations like the Discovery Center or the Seuss Trolley Extended Queue.
Green is the walkable paths, with Blue as Potential House Locations and Pink as Potential Scarezones. Finally, Orange would be the border between Day Guests and HHN guests.
In this scenario, shows could move to Sindbad, and neither park truly has to close at 6 PM. Only Mummy, Rockit, Minions, Shrek, Poseidon, Seuss Trolley, and eventually Velocicoaster would be lost to the event.