I was able to secure a couple of Sci-Fi times staying offsite this week, but I did this at 6am EST, had choices of lunch or dinner. Actually picked one of each since we're not sure which we'll go for.
But yes it is a tough one to get, but always a favorite of ours. One thing I will say about Sci-Fi is try to change up your quantity of people. If you have 2 people, try for 4, and if you have 4 even try for 6. The tables are kind of funny there size wise and I think they give priority for matching people to tables but I can't say that is totally true. But I used to have times where I would be looking for 4, and have no luck, but change the size to 6 and got a hit. I think they may be trying to not strand tables, but you don't have to bring 6 people.