Sambuster,
When I use the booking tool on the Disney website, it let's me (as of today) book out until Novermber 28, 2020 and shows prices for reservations. I tried 10/29/20 to 11/28/20 and it gave rates. Here is a snapshot:
I guess the old 500-day rule is no more. Nov 28 is 527 or 528 days from today depending on whether or not you count the 28th itself. Maybe they've gone to counting from 499 or 500 based on the check-
IN day now and not the check-OUT. That's how it is on ReserveAmerica (used by some state park systems like FL) is their 11 month window is based on check-in day and it will allow you to book the max reservation length from there (14 days in FL).
I bet it's something along these lines - you can book 500 days out based on your arrival day (and the max reservation is 30 nights/31 days).
Sorry if that's the case. That's a new change it appears (and unannounced). And yeah, no rates came up for the Fort so it may very well be sold out already. And we can blame Star Wars Galaxy's Edge too for the hyper demand I suppose.
Bama Ed
PS - but we've still got room in our October DISMeet group earlier in October 2020...
PPS - now a couple days later I'm not getting the same type of pricing replies. Disney's IT is terrible. I give up. If you can get rates and a reservation number, sambuster, go for it.