I mentioned this last year I think...
...when I go with my friend to Haunt, he does this - and you don't know how much it annoys me. (Yes, he is my friend, but all friends can be annoying) - I think, "Hey, you're not cool...) when he jumps from corner to corner and attempt to scare the person, or when he laughs in the face of the scareactor, blah, blah, blah. I don't like it, that's all. Just have fun, like you said - YOU'RE SUPPOSED TO BE SCARED. It's Halloween Haunt.
Personally, and also as advice I gave to my (former) actors, with proper group work and planning you can embarass them and get them to join the fun. Target someone else in the group for the scare, and while they're distracted trying to intimidate the initial actor, someone else comes in and takes a turn.
This may or may not work depending on the attitude of the person, which judging of character is something that comes with time. Eventually, reading groups and understanding how to manipulate the strengths and weaknesses of each within a couple seconds starts becoming second nature. Each group has their own dynamic in addition to each person having their own. There's more psychology involved in scare-acting than one would anticipate. No fears though, you don't need a PhD in order to score that precious scare.
To bring this back on topic, CoT concerns me a little, just because I have no clue what to anticipate as far as the story and theming of the house. At first, I figured it'd be similar to Cedar Point's Erie Estates in theming, with a graim background, but Cavern of Terror makes it sound like more of a dungeon experience.
Working a brand new attraction, in addition to working in a brand new location, raises a few questions I like to ask fellow workers and vets of the Haunt team without revealing them to the general public. Unfortunately, I cannot find where they congregate on the interwebs similar to Cedar Point's Screamsters. If anyone has any info please let me know, I'm prepared to identify myself as an employee, but I'd ask them same to those who respond.