In regards to numbers, it's anyone's guess, but here's my estimation.
The overall park capacity is 18,000, however it will not be this busy because they don't want it packed and four rides will be down.
Removing those rides that are closed - Tidal Wave (1000 pph), Rumba (1000pph), Samurai & Slammer (1000pph) means that's already 3k taken off the limit taking it down to 15k maximum (throughputs are estimates only at this time).
But then the park would still seem too busy and they wouldn't want it packed, so I expect another around 5k worth of guests will be taken off as well.
I estimate they will limit it to about 10,000 pass holders a day (12,000 at the most), which isn't to say they will even receive as many as that on the day/s.