I just wanted to post this (posted individually but also here as this thread rocks for all the info!!, thanks Mesaboy!!) as I found conflicting and limited information about this, even on the Disney-specific military site (which I love and use often!!). We bought the Military Salute tickets at our base, and linked them to our resort reservation (at AKL) on
MDE. The tickets are 4 big park days and 4 "water parks and more" days. To my initial reading, I thought that even though we have 6 onsite resort days, since my tickets only officially have 4 big park days, I would only be able to book FP+ at 60 days out for the first 4 days of our reservation (which would have sucked because we were going to do 3 park days the first three days, then a water park day (no FP+ needed that day), then a final park day). I had read somewhere that you could book at 60 days mark for the number of days on your resort reservation OR the number of park days on your tickets, whichever is FEWER. That would have meant that I couldn't book that last park day (day 5 of our trip) until 30 days out, since we only have 4 total park days on the tickets. I was super bummed because that 5th day of the stay (4th park day) is our MK day and I wanted to get Anna/Elsa, 7DMT, etc for that day for a party of 6. Probably not happening at 30 days....
So I was feeling pessimistic when my 60 day window opened tonight. However, it allowed me to choose dates from the full length of the resort stay, not just the first 4 days. So, at least based on my experience tonight, it seems that (at least for Military Salute tickets and staying onsite) it lets you book until the end of your resort stay, EVEN if your stay is longer than 4 days. It did, however, only let me book FP+ for 4 individual days of the 6 days I had to choose from (since my tickets only have 4 park days on them, not including water parks). This made sense to me.
So, just to be more clear:
AKL reservation: 5/13-5/18 (Wednesday-Monday)
60 FP+ window opened 3/14 at Midnight (night of 3/13)
Last day open to me for FP+ booking at 60 days out: 5/18
Total # major park days on tickets: 4
Total # individual days allowed to book FP+: 4 (NON-sequential allowed: I did 5/13, 5/14, 5/16, 5/17).
Hope this helps others using the Military Salute tickets!!