I run a charter boat in south Texas. Along with fishing redfish tournaments. I've personally been through 5 polygraph tests. And my tournament partner has now done 1. No matter what you will convince yourself that you just robbed 7 banks on the way to the poly room. It's human nature to be nervous about new stuff. Any minor infractions just tell the guy doing it about them. If your telling the truth you'll be fine. Just remember on the questions that they tell you to lie about. Make sure and lie. If you forget to tell a lie on the questions you are supposed to, you'll have to do it over and over until you get it right.