we were there 2 years ago in early september ....
it was a sudden unscheduled trip (for my daughter's call-back)....
we were pleasantly surprised by the ghost-town appearance of the parks...
and while there was free dining at the time, the restaurants were far from full (we walked into every meal with no advance reservations)...
the only minor issue was the two nights of Night of Joy in the middle of it, but it wasn't really a problem....and if we went back at the same time, we might consider attending - it looked really nice (we could hear the music from the GF where we were staying)....