Anyone done Labyrinth of Fear on Halloween

Hi all.
We are wanting to go out and do the labyrinth of Fear for Halloween.
Is the only way to book a time to go through, at the entrance of the ride? In a first come first served kind of deal?

I expect it to be bonkers busy and if I can avoid waiting all day to go through then I'd love to be able to do that.
I've had a read of the site but just wanted some confirmation from people who have been there at Halloween so I can get a decent idea of what to expect.

Thanks.