I don't believe it will be until 2021 either. I also don't believe it will be June as some think. I'm leaning towards July with DS and maybe one park and a few resorts as a test run, but who knows at this point.
I hear ya. My guess is:
Time = Sometime after 4th of July (who wants that mess when you are starting out.)
Who = ONLY resort guests
What = Magic Kingdom & Disney Studios
Resorts = Monorail Resorts (with reduced occupancy) and a moderate like Caribbean Beach and a value like Art of Animation (with a reduced occupancy.) That way all resort guests could take monorail, Skyliner, or a combination of the two and get to the two open parks. No need for buses, or even car parking (or at least greatly reduced.
So at a 50% occupancy:
Polynesian Village Resort = 847 x .50 = 423
Grand Floridian Resort = 867 x .50 = 433
Contemporary Resort = 655 x .50 = 327
Caribbean Beach Resort = 1536 x .50= 768
Art of Animation Resort = 1984 x .50 = 992
So at that's 2,943 rooms at 4 per room = 11,772 people
So round numbers, you'd be looking at 12k people split between 2 parks.
They would be ghost towns, but it would be to start. Once they get the process down, they can open other resorts at 50% and then add Animal Kingdom, etc., etc.
I do think restricting to only guests staying at Disney resorts allows them to have so much more control over the situation.
Plus, you add in MagicBand tracking and what not, they would totally be able to manage guest flow and even warn you after the fact if you had been in contact with a guest or CM who subsequently tested positive.
The real trick will be getting down there without being cooped up in a plane.