When I booked fps for this trip, there was quite a bit of availability at all the attractions for several days. It tended to dwindle for the more popular attractions as the days went by, and at 30 days out the most popular ones were gone. I was surprised at how long there was availability for FoP, FEA and 7DMT. You should be fine.
I have to be at work early on Saturdays and the last 2 trips our 60 day window opened on a Saturday - at the time I should have been leaving for work. Both times I asked to come in an hour late, but aside from getting the exact date and time I wanted, it wasn't really necessary.
ETA: Even though I asked to come in late, I still booked my fps and made it to work on time. I like to get to work normally with plenty of time to spare, so getting there "on time" was not hard. I just can't walk in the door and start right to work.