Evan said:
Unless you're visiting on a Saturday or possibly a Sunday, then a Fright Lane pass isn't necessary at all. Friday is a little iffy as i've never been to Haunt on a Friday before. Sundays, you might wait 10 minutes to be able to get in, but the time flies while you're in line because the line is always moving.
I have been to Haunt on a couple Friday nights. Keep in mind that the park does not open until 7:00 pm. I thought they did not open the front gate until 6:45 pm. So you can get massive lines to get into the park at opening. (I wish they would open the International Street Front Plaza at 6:30 pm. That way most people can get through the front gate in time to watch the "Overlords Resurrection". The park can rope off the rest of International Street and drop the ropes at 7:00 pm).
The crowds have not been as bad as a Saturday, so I am not sure if the Fast-Pass is worth it on a Friday night. You are under a time constraint with the park only open 5 hours on Friday evenings. I would focus on the new mazes and your favorite returning mazes first. Then, as time allows, hit the other mazes, scare-zones, and maybe a show (New one in the KD theater). If you want a good mix of ride time, haunt time, and show time, then Friday nights would not be my choice of day to go.
Saturdays, you have more time to ride rides and an extra hour of Haunt (6 out of the 10 mazes open at 6:00 pm | the rest of the mazes and scare-zones open/start at 7:00 pm). Course, there are the crowds to deal with if the weather is decent. A Fast-Pass is suggested if you want to get through all the mazes with a minimum wait.
I have not been to Haunt on a Sunday in quite a while. So I cannot comment based on personal experience. I would think the crowds would be equal to or less than a Friday night. Haunt START hours are the same as Saturday; but, the park closes at 10:00 pm. Keep in mind that ALL Sundays in September and October have a 12 noon opening; an 8:00 pm close in September and a 10:00 PM close in October. Sunday would be good if you want a mix of ride time and Haunt stuff. With school and work the next day, I can't see the park crowded as a Saturday.
If I go on a Saturday, I get there between 2:00-3:00 in the afternoon. I ride some rides and grab a bite to eat (limited food service and big crowds can mean LONG waits in the food lines later in the evening). Around 5:30 pm I start scoping out the maze lines and pick one to wait in. Course the new mazes get the biggest lines ("Zombie High" should open at 6:00 pm and "Miners Revenge" at 7:00 pm | Not sure with the staggered openings if that will help with breaking the crowds up).
To me the Saturday Haunt "Rush Hours" are 6:00 pm to 10:00 pm. After 10:00 pm the crowds start thinning out and the wait times drop for most mazes. The flip side is that a good number of the scare-actors are worn out by that time and the surprise, startles, and scares might not be as intense as in the beginning.
So there are plus's and minus's to each day of the Halloween Haunt operational days.