We were there the weekend of the Kentucky Derby and that place was swamped, so we avoided it. If we ever go back on a less busy weekend I'll check it out. I'm not a big gambler, but if they have a poker room I like to play Texas Hold 'em.
Siloam Springs has a nice casino and is a lot closer. They have a good buffet that's only like $6 including a drink on weekdays.
Nice state park over there, too.