Last year my friend and I opted to rope drop Test Track and used single rider when we saw the size of the crowd going in. We ended up being behind two other people and when we got to the loading area the four of us rode together on the first car of the day, and when we came back around they let us go again because no one was yet in the standby line. I imagine this was because everyone who went into the standby line was caught up in the car customization area. I don't know if we just got really lucky that day or what, and there's of course the possibility you won't have the same experience since it is single rider and there is no guarantee you'll ride together, but it might be worth a shot to try it.