Just try for it first at 7am on the latest day of your trip you canI didn't have trouble at 60 days. I have 2 FP during a 10 night trip for group of 6.
What gets overlooked is that on-site guests can book FPs at the 60 day window PLUS length of stay.My 60 day window opened up for a four day trip today and there were no FOP fast passes.
Guess we'll just rope drop it and hope for the best.