It always depends on how well the ride has been operating so far. If things are looking okay pre-park opening, they have typically been releasing about 50 BGs at 10am. At 2pm, they'll release enough to take their ETA out to their target for the day. That usually equals less than 50 because they're not quite keeping up with their schedule, so it's probably a little harder, and also riskier. But it's possible.