Dan,

Intimate knowledge of the Spirit CBA is not going to help you at the Job Fair. I would suggest you spend your time researching the corporate structure, financials, fleet composition and growth plans, along with pilot domiciles, and route structure just to name a few.
At the Job Fair you will have 2-3 minutes to impress the NK folks. You will probably be asked Why do you want to work here? If you respond with contractual details, they will probably not be impressed.
If you have a specific question about our contract, I am sure someone will be happy to respond.
Good luck at the Job Fair and hopefully you score an interview.