First, annoyingly I think it has become standard operating procedure for these events to have a first 24 hour task that unlocks the rest. It is very annoying and while I have always been content to wait this time their ploy worked and I spent 12 donuts to speed it up.
After that task is done it unlocks the event... this means the ghosts start spawning, you can start collecting goo, and haunting your neighbors springfields. There are two 24 hour Homer tasks right after the first one; however, they are *not* required to start doing everything else.. they are part of two parallel quest lines... no idea what happens after as I haven't sped these up.
No they didn't change the cemetery... there is a new "burial ground" that is part of the event. You get one for free from collecting goo but can buy additional ones for donuts (kinda like the snake rock during wacking day)
