Kentucky Derby

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This is a long shot in a hockey forum, I know, but looking for as many opinions as possible--going to my first Kentucky Derby tomorrow. I've been told to put some money aside and do some gambling as it makes the experience much more exciting, especially if you're someone like me with little interest in horse racing. Anyone in here follow horse racing at all, have any opinions or info about particular horses for wagering besides what I can read online? Or if anyone has been to Churchill Downs and has any suggestions for food around there and what not?