Our security guys and gals are quite friendly...
Take your sunglasses off when you drive up. Answer all questions honestly, they know if you are lying. If you have had any DUI charges, either you or passenger you may not be allowed in. This goes for any arrest...be honest.
Don't try to bring more alcohol and cigarettes than your allowance, it is not worth it. As already said, no guns or any weapons, no mace/pepper spray.
Enjoy your stay. Have you made reservations and have a plan on where to stay? We are an hour from Hamilton and the weather has been beautiful.