If there isn't anything better, does this seem like a reasonable way to get ballpark estimates? The Touring Plans website and Unofficial Guide have always described load speeds for attractions and have listed an estimated wait time for each 100 people ahead of you in line. Using Soarin as the example, they say that the expected wait is 4 minutes per 100 people. So, I could calculate the total capacity per hour as 1500 because there are 15 sets of 4 minute blocks per hour. Put another way, if 100 people get boarded in 4 minutes, then 1500 people would be boarded in 60 minutes. If 1500 people can ride per hour, and the park is open for 12 hours, that would produce a total capacity for the day of 18,000, which is consistent with the estimates of 15-20,000. If we agree that this approach will give us a reasonably accurate measure of a rides hourly capacity, we could go through the same exercise for every other attraction, using those Touring Plans estimates. Does that make sense?