That's gonna be rough for Horror Nights. Assuming that theoretical capacity is in the ballpark and they can achieve it (meaning no major delays, no downtime), you're looking at 12,600 riders during event hours from 7pm to 2am. It gets worse if they have to close the ride early to appease the neighbors and comply with noise ordinances, which I suspect they will. For context, a typical healthy Horror Nights crowd is double that number.
It should do a lot to soak up crowds, at least.