I don't know about your expertise in the subject matter of getting hired at Haunt, but I can tell you from experience that when you get hired for Haunt, everything is laid out on the line and finalized that day. They do not have the time to call each and every monster and tell them what their schedule is for this night, or when their costume fitting is.
For your second question, all monsters have to do a short inprov audition showcasing their voice and acting ability, in front of a panel, without props. Quick thinking, enthusiasm, and most of all, personality is required to be a Kings Island Scareactor.
yea well she told me it was up in the air but i recieved an email the other day that told me i would for sure be on the trail, the ladie that interviewed me sayd id either be in the trail or manor and i wasnt interviewed infront of a panel it was just one girl who told me to scream and to make animal noises, got kinda awkward but hey, it worked out for me