We booked our trip later than the 180 day mark this trip and I was still able to snag a BOG dinner for 6, however I can't seem to find a reservation for Sci-Fi other than the time that overlaps with Fantasmic. If Sci-Fi is really important to you, I would consider bumping that one up. Also, Trattoria Al Forno might become more popular once reviews start coming out, so you might want to keep an eye on that.