Just as a reminder for the singles riders line, you will not ride with any other members of your party. My husband and I will do single riders at Rock N Roller Coaster since the Studios is tiered so we do Toy Story Mania with Fastpasses. This last trip, we did Rock N Roller Coaster single riders and he was behind me in the line. No big deal but when the single riders were let into the preshow, I was the last person allowed in. I about said, "but he's with me!" but then realized which line I was in.
So - just a hint for others who might want to do single riders and all stay together. It very well could not happen.