Don't know about the Peppermill first hand. My parents went down there for dinner one year and to walk around and they said it was nice.
Every year my family stays at either Silver Legacy or Eldorado. They are connected and both are very nice. Clean rooms, plenty of choices for eating, etc. About a 5 minute walk from the bowling stadium so we don't have to spend money on a rental car.
A large number of guys from our group stay at Harrah's. Also very nice and about a 5 minute walk from the stadium.
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It IS next year!